Not suprising to be honest. In middleschool and highschool I would stay up even later. Wake up for school at 7, get there by 8, class till 3, after school activity till 5 or 6, done with dinner by 7, two hours or so of half assed work (takes longer the more half assed), then 9 o clock would signal that the rest of the day belonged solely to me and my interests, and I would be on the laptop or play video games untill whenever I got tired. Usually I'd clock around 5-6 hours a night of sleep during the week, and make it up by sleeping close to 10 on the weekends.
College set me straight with sleeping, though. I was able to schedule classes no earlier than 10:30, and if I went out late into the night and got hammered I could sleep in on a whim without consequence. I was also able to have nap time again. Definitely struggled getting sleep with a full time job now, but its been getting better. Everyone where I work has their own schedules. Couple of us are here at 7, me and others don't get in till 10-10:30. Sometimes I work till 7, most of the time I leave by 5, and sometimes I leave at 3. Rigidity kills the soul.
7:00pm-8:00pm -- dinner with the family (during tv, possibly)
8:00pm-11:00pm -- homework + tv (mostly tv)
11:00pm-1:00am -- tv
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Even including sports practice, we've cracked over five hours, and that's from when I was in grade school.