I thought that the researcher that 'discovered' ADHD admitted oh his death bed that it was just a scam he invented to make money on the drugs to cure it.
Oh, trust me I wish I never could relate to the ADHD symptoms, but for better or for worse it exists. Heck, the concept of Alzheimer's sounds very suspicious ("How do you forget your name!?")... until you see someone with it and then it's just sad :(