I have not read all 78 posts but I have a few questions. Who is this rating system for and how will it be implemented? My initial feeling is that it is too complicated and that will lead to very different ratings by different people. Furthermore, how do you know what decile to put a course in if you haven't seen at least a significant number of them? What are you judging against?
Mark: Thank you for your interest in my soon-to-be-infamous and possibly retired Decile system!
Seriously, I initially did this because a knowledgeable friend was one of the first to see North Shore and said it was, "pretty good." I asked if it was in the top 1/4 of all clubs in our area and he paused, reflected, and said, "yes." I didn't give it a second thought.
The next day I realized I didn't know where the line of demarcation was between the top 1/4 and those below it. Only one way to find out, so I listed every course I've played in my area. HNP for "have not played". Define the area with which you are familiar as you like. I admitted on the listing I sent out to those who requested it (PGA SHOW VISITORS thread) that my deciles may have been SLIGHTLY <definitely not much> skewed because there were a few courses I never went to play. I know they would be 7th to 10th decile, so I'm not in any hurry.
The reason I see relevance is that there WILL NOT be significant differences in using it across different people. BUT YOU MUST FOLLOW the program to be relevant. Bill V.'s post just above is a little troubling because he has admitted that he didn't play the bottom 30% of courses in his area. If he put them on the list and added (HNP) we would know that it was done with the best intent to protect the deciles.
Because a decile has an absolute definition, the breaks will only have relative interpretation in relation to the courses it is compared to. Since that is defined as the entire population of an area, that also isn't open to interpretation. Think in terms of "Decile rankings for Central Florida, by John Conley" and "Decile rankings for Michigan (ex. U.P.), by David Wigler". Several others have been posted.
If Noel did his decile rankings for courses he played on this year it wouldn't help much. He played almost nothing out of the Top 5% of all courses in the world. You could look at his list and have a nice discussion on whether he favored National over Dornoch, but they are clearly both great.
Come to O-town and where're you going to play? How 'bout Myrtle? Whipping boy Pelican Hill charges over $200. Is it worth it to you for a 3rd or 4th decile course? To some it must be. Perhaps they live in New York or Chicago where access is tough and it is nice not to tee off the winter mats at Waveland (since renamed for some guy).
Someone, you?, once told me that Fiddler's Elbow was "average". All I can say is that anyone who thinks Fiddler's is average is woefully out of touch with reality. I'm guessing it is a 2nd decile course nationally. 3rd at worst. Far better than average.
I realize a few very select areas don't have a population of courses that would let this work. Long Island comes to mind. But it should work just about anywhere else.
Who is it for? Anyone who enjoys the game of golf and isn't fortunate enough to always play top courses. I play courses that are WAY skewed whenever I'm traveling. Not everyone does. For me to tell someone that Reynolds National "isn't very good" or Oconee Club "was a bit of a letdown" isn't fair to the course if the person I'm talking with doesn't often have chances to play courses that nice.
Telling someone they are both 2nd decilers lets them know they are WAY better than average, and lets someone who frequents top courses know they don't need to make a special effort to see it. After all, if 10% of the courses in America are better, why should I take the time to see that one?
I hope this helps and I hope it makes sense. As I mentioned to Wiggles in an above posting, it may work better for you to have three quintiles (80-100, 60-80, 40-60) followed by three deciles (30-40, 20-30, 10-20) and use a Doak Scale from there. After all, Tom admits in his book that he only intends to separate the best from the best. Average courses get bunched together and anything below is an afterthought.
The point is that I feel some other system should be available that isn't really open to interpretation. "Very good", "bad", and "pretty good" don't have enough meaning to me. It reminds me of the time my friend Jeff was describing two girls he met. "One was alright looking and the other wasn't bad."
"Jeff! Which is better? To be 'alright', or 'not bad'?" If the girls only knew! Should one have been insulted?
Ron Whitten's index is equally vague. 1.0 to 10.0 is the scale, but if I told you a course got a 4.3 would you want to play it? If so, why? If not, why not? A 4.3 on the Doak Scale is pretty good. I know I'd like to play there if it was an alternative to sitting home.
Now, imagine the course is a 6th quintiler. Would you want to play? Maybe, maybe not. But you won't be surprised when you play it. You may think it was a 7th quintiler and you may think it was a 5th, neither of which would start an argument.
The Naffer had a post on Dyker Beach and we've all read about how much fun the Pac-10ers have had a Pacific Grove or Pajaro. I haven't seen any of them, but can assure you that they are only good if you don't compare them to New York courses like Westchester and Quaker Ridge or NoCal courses like Cypress Point and Pasatiempo.
If Dyker and Pajaro, which I'm hearing are 8th and 6th (approx.) decile, aren't that bad, how can Pelican Hill be awful. No one has told me it is any worse than a 4th decile course. No matter how you slice it that means it is better than Pajaro and Dyker. I know the tendency is to compare a $200 course to the great ones and let a low-end mune be evaluated in light of a $15 green fee. But deciling takes care of it.
Would you rather play a 3rd decile Disney course for $120 or a 4th decile local for $40? That's for you to decide. But without a regional expert, in this case me, telling you how they stack up relative to others you'd be left to choose between a $120 course that "isn't as good as I thought it would be (description no doubt provided by one of your friends at work who you aren't sure how much he knows about golf)" and a $40 option that "is one of the legendary course designer Lloyd Clifton's greatest gems (that description you've no doubt been exposed to in the "Golfers Guide" provided by the concierge at your hotel)."
And you are right. To have any validity you will have to play nearly all of the courses in the area. Take a flatlander to Makena on Maui and they'll love it. You'd need to stay in Hawaii for at least a month and travel to some other islands to know if it is #2, #22, or #32 in the state.
Happy New Year.