As a father of a "special" child...I understand where your coming from.
My boy is 5 1/2 years old with downs syndrome. His speech really is his biggest hurdle. Kindergarten (being around other kids) has helped. He too has speech therapy several times a week...and it has def. helped.
He does a lot of babbling...but I can't wait to have a conversation with him, he has a lot to say!
Its tough sometimes...people who don't have a child with a disability ...really don't understand!
Keep your chin up...I have faith in the Lord...there is reasons!!!