I just realized one thing ... my initial post was from about 3 or 4 weeks ago ... we have had some improvements since ... last week, basically overnight, DS3(this was 2 days before he turned 3) went from speaking in single words to speaking in full grammatically correct sentences! He still doesn't talk much but is clearly capable of it. But there still seems to be the issue where he can pronounce words clearly and then the same words say again and you have no idea what he's trying to say. His private speech eval is tomorrow morning so I'll report back what they come up with!