Preface: I don't have much room to talk as I've only gone to Jr's.
Our platoon never got 8 hours of sleep. The lights go out at 2100 and come on at 0500 but you have so much shit to do during that time; marking gear, writing essays, fulfilling billets, etc. I found that the most successful candidate staff members were ones that met after lights in the head to discuss their game plan for the next day. The SI's usually come out of the duty hut around 0400 and start screaming at the firewatch so that everyone can hear. This goes on sporadically until lights. On average, I would say I slept from about 2230 to 0430.
What's been said about the dumbing down of PT is definitely true. We had morning PT about three times a week and it wasn't anything that tough. Usually a 3 or 4 mile (not sure) fartlek run and some push/pull abs.
Essays still happen at OCS. Our platoon staff was far more brutal than the other platoons in issuing the essays. I wrote two or three and every third word had to be in red ink.
I believe this is Col. Mancini's last year and I won't be going back until summer 2010, so it will be 'interesting' to see how much different Seniors is under a new CO.