If it is true, I would see it, but I haven't.
even several of my good friends (hearing friends,,, so this is not about deafness) told me they were diagnosed with ADD or ADHD, and they write alot to me. I have not seen a single writing issue from them. One of them never been on ritalin or any medication (her parents believe it is just a personality quirk as well) and she writes just fine.
I think ADD is like deafness... the real issue is hidden under deafness or ADD
