Earlier quoted context omitted.
Good point. The author of that article, Baron-Cohen, has previously written (debated?) about whether HFA/AS is a disability OR a difference. Speaking for myself, and many who identify as having Asperger's -- and your son, from what it sounds like (who sounds really cool!) -- it is indeed a difference , and by no means a disability.
Low end ASD can make dating really hard for men, and their often inflexible nature makes them hard people to live with at times. I think from that perspective alone it's a disability.
I'm probably guilty of not viewing this as disabling because I'm treating the term too concretely, as if a disability has to be something "physical" that might require special accommodations. But yeah, I suppose my challenges in understanding the game of love are disabling.