I am in bed by 10 PM and asleep before midnight. The delay is waiting for my girlfriend to wind down. The difference is that until 3 years ago I lived in NZ and finished work at 6PM at the latest. I then commuted home in 30 minutes, and had dinner by 7:30PM. Most of my friends and colleagues did the same. I am still in that routine, except that dinner has been pushed back later, as my girl does not get home until 7:30 at the earliest from work. Her reason for this is that she works for a US company that does not seem to start it's day until 10:30 AM. I can still be home from work on time, because like in NZ my colleagues and I all start around 9 AM.

So I get the feeling that our sleeping habits are becoming driven more from work than social lifes.... especially as you get older.

Currently I am on the East Coast working, yet am still mentally on West Coast time... so I wake up at 3:30 AM and got to bed at 7 PM. And have a headache because of it.