This "most teenagers stay up late" must be unique to U.S./European teenagers with access to computers, video games, mobile phones, internet and lax parental sup

This "most teenagers stay up late" must be unique to U.S./European teenagers with access to computers, video games, mobile phones, internet and lax parental supervision. As someone who went to boarding school from age 14-18 years where sleep and wake up time was well regulated I can tell you for a fact that we all looked forward to sleep time. Most students preferred waking up earlier to study to take advantage of the quiet and focus.