While I agree with almost everything he writes, after 29 yrs. of working with children I still believe that there are some children for whom the ADD/ADHD diagnosis is valid. If anything, the bad parenting (with which I heartily agree has been occurring) and the liberal psychobable explanations that have encouraged the lack of disciplinary action and abdication of good parenting may be masking the real deal. When one considers all the women that are on some type of birth control (that directly effects the hormonal system) and the increase in drug use in our nation - both over the counter and illegal - it’s not too great of a stretch to believe that those things are having an adverse effect on prenatal development.
Is ADHD over-diagnosed? I'll bet it is, just as autism is over-diagnosed. But to posit that the parents of every child so diagnosed “hate” their children is insulting and just plain stupid.
Another type of child who has valid brain function issues is the child who has had a surgical operation requiring general anesthesia during the first two years of life. The normal brain is growing so rapidly at that stage of life that even a few hours' interruption can cause some types of "hiccup" malfunction that seem like not paying attention.