I have a son with Asperger Syndrome as well. It is both a blessing and a curse: he got punched in the face at school a couple of weeks ago because his social cluelessness led him to say the wrong thing to the wrong person, yet later this month he will be taking the SATs (he's only in 8th grade).
It is sometimes difficult coping with the ignorance on this site expressed by those who think ADHD and related problems are simply caused by "lazy parents," but there are also many who have walked in our shoes and know these things really exist.
I hope no one here misconstrued my statements as meaning ADD/ADHD doesn't exist. I know what it's like to have a truly perplexing child. I do, however, happen to know a few really lax parents with unruly children who insist the children must have a disorder.
We haven't had to deal with fights. Mostly, it's just harrassment and a couple of extortion attempts. We spent many years, pulling our hair out, trying to change him. It was futile (and expensive). I'm still working on total acceptance, but we have progressed to working more on helping him understand us, rather than trying to demand he BE like us.