I tend to get into work at 10:30 AM which is later than all the other developers at my workplace, but they all have families so their schedules may revolve around other responsibilities. I've tried getting up earlier, but I always revert to the 10:30 schedule after a day or two. I always end up doing something or getting more sleep that undoes the early plan. While I understand the lack of interruptions is a benefit, I'm not even sure why I get up at 8-8:30 AM. Perhaps it's just a random habit.