Intelligence is correlated with sense of humor

It's also correlated with success, as Lumifer mentioned elsethread. I thought we were talking about the direct effects of intelligence itself -- though, as gwern points out, that doesn't make too much sense.

Everyone I've ever heard talk about the jock/nerd thing was a US nerd.

IME similar things also happen in Italy (with some differences) and Ireland. I'd guess anywhere people are made to study things they never need outside school by bad teachers, they will resent that and dislike people who can learn such things effortlessly and enjoy it. (Of course I wouldn't expect that to happen as much in places like say Finland or Singapore.)