In reply to FrustratedOfSheff:
in my opinion:
Historically the UK is classic - note the big gritstone threads of Supertopo
I also agree with the points that there is so much variety in a small area
There is no denying that our classic routes are significant on a world level & very special. A few examples being: Left Wall, Rght Wall, Cenotaph, Dream, The Rasp, London Wall, Bishops Rib?, Dream, Archangel, Flying Buttress Direct, anything at horseshoe
BUT, in my experience
Right Unconquerable would not be classic in the USA - they have 200m flake systems, so 15m seems poor
Billy Whizz would be a horrid quarry route
Bond Street same as above
The sport climbing is generally horrible except on a few steep natural crags