My boys are early risers, no matter what time they go to bed, although they ARE getting better at sleeping in.
My 7 yr old is usually up by 7 every day, no matter what. He scared the crap outta me over Christmas break when he was sick. I woke up at9, and he was still asleep! I had to go check and see if he as still breathing, because he's NEVER in bed that late!