I'm way out of my depth now. I thought she might be like my older son, who had hearing problems early on and both depressed listening comprehension and listening attention span scores.
It might be that she has some sort of expressive language problem that has nothing to do with her internal thought process. I just have a funny layperson's feeling that it's not specifically that her mouth is running too slow-- that might cause problems but I just don't see how it could cause an inability to get anything out.
I guess at this point you've got a couple of main options: wait and see, and consult further specialists. I might wait and see for a little while, and gently encourage her to take her time, and chip away at the problem any way you can. Kids develop at different speeds, and asynchronous kids more so.
