I had 2 boys, I say had because they're grown men today and completely changed personalities from when they were below 12, living on the other side of the Earth too... so sometimes it feels like I once had kids, that are now disappeared. :(
I agree with your advice, but from what I've heard most of it would be equally applicable to girls. My sons were/are both AD/HD like me (or whatever they call it now), and they do say that more boys than girls have it, but I suspect it's simply under-reported in girls, for several complex reasons.
The main difficulty in dealing with AD/HD isn't gender, but simply knowing about it in the first place. People who know nothing tend to try to control it with pure force and violence, and this is of course the absolute worst thing to do.