L.W.
My oldest son did the same thing. He spoke at a young age very well. His dr. ended up telling us that this is very common at that age when they are learning so many words so fast. It is almost like their mouth can't catch up with their brain. It was definitely getting to the point after a few months that I was really worried but it ended up just going away after 3 months or so. At this point I would try not to worry about it. I'm guessing it will go away on its own in a couple months.