I have a hyper son 2 of his church buddies were too. They said qall three were adhd . 2 of us fought against meds the other used a medatation thrapy hes still a bit hyper but studing well. The kid on meds is always struggling. My son I home schooled and kept him active no tv only an hour computer. Lots of very physical activity, he could only calm down in the car so he learned a lot of his lessions in the car. Each kid is different its not an across the board problem. I think telling him would help him understand that he is unique and not like all the others (thank goodness) . When we sat the terrible threesome (as they were called) not by the parents we called them the 3 amegos. ) down and explained that they were different and had to worjk harder to be more socally acceptable behavior. It made them not feel as weird and like out casts they had a reson for it and could then move on to deal with it.
We are now 15 years later and as I said Med kid still struggling, meditation kid fairly normal, and my son(21 AND THE OLDEST OF THE 3) Is fairly normal some days too normal, but other days he has so much energy he drives me nits and I remind him to go jogging. We used a diet program also becouse he had food allergys that we weren't quite sure they didn't perhaps play a part in his hyper activity.