Ed,
Once again Tom Huckaby pretty much said what I was going to -- I think we are of like minds WRT Old Head.
I think you are off base if you ask me to compare Old Head to TOC North Berwick, et al on just the golf course and not the setting. That's like the "how good would Pebble Beach be if you transplanted it to a field in the middle of nowhere" threads you see here from time to time. I don't deny that the setting is part of it, but even if you don't believe setting is important this is probably about the most spectacular setting you can imagine. It makes Pebble Beach or CPC look like they ARE in the middle of a field by comparison.
Given how extreme the penalties for being offline obviously are on some of the holes, and the course's precarious perch so high up in one of the windiest parts of one of the windiest countries around, I think its a pretty good accomplishment just to make the thing playable for all levels of player. It makes wide look narrow, narrow look wide, gives you confusing stuff (like the bunkers on the inside of #4's dogleg recently discussed here) that can act as "stay away" for higher handicaps playing from the up tees from one angle, or act as an sighting line to tempt better players from the angle of the tips to perhaps foolishly attempt to cut the dogleg over the cliff. Maybe its because I was playing back by myself and my dad and a couple other members of our group were playing a couple sets up and just seeing what their shots looked like versus mine, and hearing their reactions to various features versus how I saw them really brought this out for me.
Just for grins, of the courses you named I've played Dornoch, TOC and North Berwick. I'd put TOC first, North Berwick second if you go purely by the golf, Old Head second if you allow setting to enter into it, and Dornoch last. Though before the GCA RD membership contingent skewers me, I hasten to add that I only played Dornoch once, in 1991, and didn't really think it was all it was cracked up to be. Perhaps because there wasn't a whole lot of wind, and I'd played eight days in a row by that point and sometimes get a pretty good swing going when I do that. I just tore the place up, and if I could have putted would have finished under par since I had makeable birdie or eagle putts on nearly half the holes. I tend to knock down courses that I don't find sufficiently challenging, but I'm planning to revisit it on my next trip to Scotland. Anyway, it was a LONG time ago, on my first overseas visit, and if I'm about a 4 in architectural knowledge today I was a 2 then, so maybe Dornoch boosters can just believe I was too stupid to recognize greatness, and might even be correct
Of the courses I played on last summer's visit to Ireland, I'd rate them:
Ballybunion Old
Lahinch
Old Head
Tralee
Waterville
Killeen
Mahoney's Point (but I have no idea how this is on anyone's list of places worth visiting in Ireland, and think its 18th being in Tom Doak's "all scenic 18" just has to be a misprint that will be corrected if he ever does a new edition of the CG
)