K-sensei told me that on his trip to Taiwan he sparred for about 2.5 hours and did about 17 rounds! I don't think there are many black belts over there so of course everyone asked him to roll.
I've just started listening to Open Mat Radio. There are so many podcast now for BJJ its crazy. The latest episode was an interview with Eddie Bravo. He mentioned about drilling and how important it is. I plan to be more proactive and record my drilling from now. For example, I will chose a standing and a ground technique and drill it for 1500 times. This may take days or weeks but I will scratch off a record of it each time.Why 1500? I heard that number somewhere, forgot exactly, concerning drilling and the damn thing stuck in my head. I'll keep my notebook handy at class from now on to record my numbers.
Sparring: 6 x 6 mins = 36 mins