No, this is not an 11 year old who can play music but who is socially inept. These are two separate people.
The autistic musician is well into his 30s, does not speak, eat or move without assistance or direction. He can however hear a new 30 minute composition after hearing it one time. This is a seriously mentally handicapped adult.
The 11 year old was simply an unsupervised, un-parented who got away with anything he wanted to under the diagnosis ADD.
My apologies, perhaps next time I should read your post a little more carefully. I was just a little upset yesterday with some of the comments and I think I just partially skimmed yours and did not read it correctly.