Yeah, I remember not being sure about my DS as well because I would hear him up forever just singing/talking...and then up early doing the same. Now he seems to be out shortly after 9pm and usually I wake him around 7:00 if he isn't awake yet, but sometimes he is already up. He does seem to sleep better if he works really hard at something mentally during the day. Like on days he goes to his montessori school he has been sleepy earlier at night. He still doesn't fall asleep earlier but gets tired and sometimes sleeps in longer. That is a good thing. I love my sleep. I would love more of it. And I should go because it is going to be a late night as I brought some work home with me to do tonight. (sigh).