I know some kids your DD's age who seem to be just like her when it comes to their speech. I know one of them (who's child is a few months older) were taking their child to see a speech pathologist as they wanted to just be sure nothing was wrong and start early intervention if necessary. Unfortunately I don't know how she went. It does sound like she is on the 'normal' range (whatever that is), but I do agree that if you're worried talk to daycare and take it from there.