S.H.
my son is 3.5 yrs old. and has good vocab, and can be understood most of the time. But often (usually when shy, or when busily playing) he seems to get lazy or something. he'll rush through words or phrases that he uses commonly, and doesnt take the time to really articulate his consonants. if i ask him to repeat it he will say it the right way. so i know he Knows the right way. there are still a few letters that he gets wrong consistently, but if i correct him he gets it and tries and gets it right (like useing a w sound instead of an l sound. or f sound for th. ie: "mama, fank you for my food, may i get down pwease?"
i think its ok. especially if she is meeting all other developmental markers.
:)