Well, I have one too...
Cooper sleeps with us and he sleeps as late as I do, until around 9ish or so. Husband gets up at 5:00, he has to physically wake Cooper up and take him out..., he does his business and is right back in bed with me and asleep. I wake Cooper up when I get up around 9 or so, no telling how long he would sleep if I didn't. I got him at 10 weeks, and he got me up the first week around 2, but then right back to sleep. After that first week, he sleeps until we get him up. He also will be playing and then it's like enough and he is out like a light. Today was a busy day for him and he has slept most of the evening...but I know he will be ready to sleep as soon as we go to bed and he will sleep all night, just like his usual!!! Also, during the day, if I ever want to take a nap, he will lay down with me and sleep as long as I do. Guess we both got lucky!! Oh yeah, he can play all out too...he is not always sleeping, just when he does sleep, he does!!