Rag2177,
It sounds as if our sons have very similar habits. I don't know if you read about my son (he's 9)in earlier posts, but he too, recently told me that he counts letters not only while people are talking but on the wall, within the books he's reading, signage, etc. He also has some other number issues as well. He is also a very bright child and is constantly moving and talking. He's always been that way. He talks nonstop (even in his sleep). Does your son have any tics or involuntary twitching? My son does, but it's very mild.
I took my son to the doctor and he suggested n