DeeDee - I don't want him to think he's any less capable than anyone else.
I was going to, actually... a few weeks ago. At the insistence of the school we took him back to another doctor - this one a provincially renowned psychiatrist who specializes in ASD. He said our DS doesn't show enough signs of ASD to warrant a full assessment, but definitely has ADHD. I thought, ok... enough doctors have agreed on the ADHD, so maybe I should tell him. I had a window of opportunity (just DS and I at home alone) but felt that I couldn't do something like that without DH's blessing (he was at work). I lost the window (DD came home, domestic chaos resumed, lol) and I've since lost my nerve.
I will tell him, but the moment has to be right...