if it works for you, (and she is getting enough sleep) then its never to late!
my dd is 10 months, and is usualy asleep by 11pm, my boys are 3 & 5 i try to have them in bed by 8:30- 9 the latest but it dosent always happen. nights like tonight, the boys were being difficult for bed and diddnt go till 11ish, so dd wouldnt go to sleep untill 12, as she likes "her" time when there in bed, but she will probably sleep untill 12 tommorow now (after her early hour bottle and cuddle) im hoping to start her going to bed earlyer gradualy week by week, so the rest of this week ill be aiming for 10:30, but thats just as im needing to have kiddie free time and bed earlyer these days!
when we had ds1 i couldnt sleep at night for the first few months, so he would be up till 4-5am, but we would sleep untill 4-5pm so it was right for us at the time kwim?