Well, I am a graduate student, but I can tell you that as an undergrad (doing crew, so waking up at 4:30am five days a week) I slept about 4 hours a night on average. Then I would take a nap during the day, every few days. I was a walking zombie for the most part, all four year of college. But damn I loved crew.
And now that I am a grad student, I sleep about 6 hours on average, though usually a little less than that. There have been some semesters when the average was around 5, since I pulled so many all-nighters due to workload.
Someday, someday, I will get 7-8 hours a night. I fear for what it does to my long-term health, sleeping so little for so many years.
