Hi - i don't think anyone was offended by the label statement. I bet there are several on this board who have encountered teachers who didn't understand that the behaviors they were trying to label as ADHD or otherwise were actually more related to a kid who is acting out because he is gifted and people don't understand him/her. I just think that some of the more prolific posters aren't on the board right now!
I'm sorry your DS has had to go through these bad school experiences. I know there are others on the board who have had similar issues, and hopefully one will post some advice about what worked for them. It's not really something I know much about yet.
Here is another link, in case you haven't discovered Hoagie's gifted yet:
http://www.hoagiesgifted.org/sensitivity.htmAnother site that might be helpful:
http://www.sengifted.org/