Hey, els-
G sleeps between 10-11 hours at night with a usually 2 hour nap. We do get an occasional 12 hour night, however, as well as a shorter nap (1 - 1.5 hrs.)
I agree with emmalola...we've noticed that the more sleep he gets, the longer he sleeps. We try to get him in bed by 8 p.m., though that's been tough this summer. He'll usually sleep till 6:30 or 7 a.m. and nap from 1ish to 3ish.
I'm really hoping he keeps his nap when the new babe arrives!