D.B.
Don't listen to friends who "can't believe" something about your child! While their children were developing the bladder-to-brain connection, your child was advancing in some other area. It all evens out! You can't "train" them when this is a question of physical development that is totally out of your (and her) control.
My son had nocturnal enuresis (nighttime bedwetting) for a looooonnnngggg time and even needed medication until he was 11 or 12 - the neurological connection just wasn't there. We did the meds because, at some point, he needed to sleep and to be able to go to sleepovers. The urologist told us it's very common, particularly in boys.
I'm not saying your daughter will go that route. I'm just saying that we learned from many experts that it just comes when it comes. Listen to your pedi and DO NOT wake your child up. Sleep is more important. There's nothing wrong with your child's timetable.