It is seriously like they blanket diagnose all kids with ADHD or ADD anymore. My nephew was "diagnosed" with ADD in his former school, and was held back... when he switched schools his new teacher asked "why was this child EVER held back, he is on a 4th grade reading level, and excels in math", they just couldn't understand why he was held back or "flunked" I guess would be the other word commonly used.
Unfortunately, social immaturity is one of the issues that ADHD children face. From what I understand, medication does not attack this issue directly.
Her dr may be able to reccomend a local psychologist who offers social skills training for ADHD children. There are also several books out there on the subject of helping ADHD children with social skills development.
Another thing to try-- martial arts. Sounds crazy, I know, but the physical activity in martial arts actually ENCOURAGES physical control. The actions are repeated over and over-- until the child gets is right. Its sort of less stress in terms of sports. My son used to be aggressive, on top of distracted and goofy:)-- martial arts absolutely got rid of his aggressive tendencies, and gave him a good way to develop social skills. Its been great for him.