I've found that ALL info sources which claim there is NO such thing as ADD/ADHD are Scientology-linked. Way overdiagnosed? Sure. Way overmedicated? Sure. But nonexistent? That's a Scientology doctrine, not reality.
My son has been getting this (
http://www.orgonomy.org/article_094.html) therapy for sometime for 'ADHD'. It's not a quick fix but the side effects of drug therapy in my family is high.
He's come very far. Even some professionals now think he's just ADD! His friends who were diagnosed at around the same time and are on meds have varying results. I see that their inconsistent parenting (strict/not strict back and forth) as an ongoing problem with these kids who can't have the luxury of lack of structure.