DS2 was a late talker, didn't really say much other than mama until he was about 24-25 months. He was 3 in July and about 1-2 months before his birthday his vocab just took off and now he speaks really well and in full sentences. He does have a lisp and I think an upper lip tie which I suspect we'll end up seeing a speechy for. Not sure if that was related to him speaking later. I think he was just doing things in his own time.