But in general, I think they are correct, in most cases the really great holes don't have signs saying they are top 500 or something. Personally, I don't think there are 500 really great holes on Earth. Just like every golf course that is top 100 is not great, some are just very good. Same with the holes. Being top 500 doesn't make a hole great.
Guess it all depends on your definition of great. How many golf courses are there are the planet? 20,000? Holes? 300,000+?
If those numbers are even close, then the top 500 holes would be close to the top 0.17%. By a statistical definition, that's pretty damn great.
Subjectivity brings much more into doubt. Could just be that 19,000 of those course don't possess a single great hole - doubtful, but possible - that makes the numbers much more in doubt.
There's 18 great holes at Oakmont. None of them need a bell.
Watch next weekend on TV if you think I'm biased. I'll be the guy wearing the blue Nuzzo Design hat.