Certainly not before forties. I'm almost forty, and it's still the same in this age group; myself included (just less frequently than in my 20's because I can't afford luxuries such as no-visible-consequences all-nighters anymore, I guess). ;)
I'm not sure how relevant that is. If someone is in their 20s, they're likely not going to find themselves in the situation of having to wake up early for highschool.