About 7 hrs a night...I never nap.
On the otherhand, my roomie, sleeps AT LEAST 10 HOURS every night. If not, he naps during the day to get his time in.. [btw, i voted for 7-9 hrs/night]
I've never pulled an all-nighter either, but only one quarter completed so far.
You know this survey's results aren't the most valid, because it's not a random sample (in the most literal sense, as you have the partcipants who all internet users, and on a specific message board) and it's self-inclusive (IIRC) that is, each participant gave their input on their own will/self-approach.
(Not trying to harass ya, I'm just recalling what I learned from staying after my pre-calc class to finish my tests, since stats was in the same room afterwards ]
The teacher and kids were very specific on things and seized every chance to challenge the validity of any data/stats.
regards,
keyshawn