Yep. DD1 was pretty easy, but DD2's body clock was so messed up it wasn't funny! She was on a 10pm bed time for years... but that was better than 3am. She's now 8 - 8.30 thanks to school.

DS is anywhere between 9 & 11. Some nights he'll crash before bed time (8pm), but no matter what time he is settled in bed, he can lay there for hours without falling asleep.

DD3 is between 8 & 9. Not too bad. I don't mind because none of them wake before 7.30 in the mornings. So I get a couple hours to myself after they go to bed, but I'm not up too early in the mornings. And if I need to I can get up earlier & none of them disturb me