Thanks, Peter, but I'm only "qualified" to express an opinion, as is everybody else here. from the wettest behind the ears newbie to Tom Doak. "Greatness" in golf courses (or movies, or pop songs, or wines, or even whether or not to use the "oxford comma") is all in the mind of the beholder. The 30-40 paradigm fits for me, but probably not for others. I think that 30-40 of anything is the limit beyond which one should not pass unless her or she is a complete fanatic. For me, for somethings, I can hard budge myself to go beyond 1 (e.g. ketchup, best versions of "The Macarena" etc.).
That being said, I think that the "Three WOW's!"/no mehs..." rule (and all its combinations and permutations) is a useful key to discriminating between the quality golf courses. At the very least, it supports my long held opinion that neither The Old Course nor Pinehurst #2 are "great" golf courses, the latter for violating the "Three Wow's" criterion and the former for violating the "no mehs..." one.
All the best
Rich