I was asked to skip a couple of grades when I was in school. I don’t think it was because I was smart, but more because I was a hassle in class. The teachers just wanted me moving onward (and outward from their presence). I didn’t do it because I always had a crush on some cute girl, and didn’t want to leave. The result was I never got the girl.
Now a young boy from Korea is taking skipping grades to the extreme, as he has been accepted to the physics department at a university.