This professor is getting a lot of press and here is one response http://notesofapsychologywatcher.blogspot.com/2012/01/ritalin-gone-wrong.html

There are several issues with this article but to dismiss all the studies on the genetic component and the science behind dopamine seems to me a bit of a private agenda being put forth.

Plus he ignores all the research on women and ADHD and the High IQ and ADHD which do not fit into the bundle of goals that he states are "the academic performance, peer relationships or behavior problems, the very things we would most want to improve."

Within the High IQ population these issues are not paramount for the most part. Research has shown that most of these kids don't hit the wall until secondary education or adulthood.
http://www.drthomasebrown.com/pdfs/OJPsych.HighIQKidswithADHD.pdf . Anxiety issues represent a good chunk the ADHD picture.

Kristine G