Fortunately, when I was a child back in India, ADHD was virtually unknown (probably the case today as well). Most of the time, my parents chalked off my inattention to "lack of discipline" and were happy as long as my grades were good. I found the coursework very easy (despite studying for only 1-1:30 hrs a day) and topped most of my classes.
University here in he U.S wasn't hard either. My problems started once I started working. Couldn't code continuously for more than 15-20 mins at a time. Things got boring very quickly once I got the "aha". I couldn't hold a lot of program state in my head. I was always searching for that "flow" people often talked about.
Adderall really helped me. I use it very sparingly these days (especially on days that I have to code some important pieces) though.
Bottomline, looks like this is purely genetic and fixing the dopamine pathways isn't exactly like curing malaria, you can juice things up but the brain will want more. Parents can choose to give it to their children but they'll suffer some time down the road. I'd rather let the kid enjoy childhood and help him in other ways (exercise, note-taking, engaging activities etc) and put him in a reasonably good path to success. Let them take drugs if necessary once they've wised up as adults.