I think it's a Doak 7, if the definition is the following:
7: An excellent course, worth checking out if within 50-100 miles. You can expect sound design; interesting holes; good conditions and a pretty setting; if not necessarily anything unique to the world of golf.
That sums it up perfectly for me. C&C make the best of flat portions of the property with imaginative design in the routing, bunkering and greens, and then hit the nail on the head in taking advantage of the better parts of the property--for example in #10.
I can't comment on Andy's placement in the rankings, but I can say I won't be going back to the Kohler Irish course ever again, unless you're buying Chris, and you could add another 20 bucks to the Warren greens fee (I recall $55?), and I would still consider it a great value. Look forward to getting back there.
Pat, it sounds like you made a special trip, so not sure why you would categorize it as a Doak 5 or 6:
5: Well above the avg. course, but the middle of this scale. A good course if in the vicinity, but not worth setting aside a day to visit.
6: A very good course, definitely worth a game, but not necessarily worth a special trip to see. It shouldn't disappoint you.