greyriverside, it isn't just about sitting quietly in a classroom.
My brother was not a normal child. He cried a lot, had tantrums because he couldn't handle any complicated situations, he couldn't concentrate on anything, couldn't tie his shoelaces, couldn't keep anything organised. He was very thirsty, and as he got older, he got increasingly depressed and tired. By the time he was thirteen, he was still doing all the childish behaviour, but his tantrums were going to land him in the police station because they were increasingly violent. My parents tried everything discipline-wise, but they were getting to the end of their tether.
After he was diagnosed as ADHD and treated, he changed within a few days to being a normal person.
Because I SAW that change, from "off the end of the spectrum" to being just a normal person, I can't accept that ADHD is just a classification for normal behaviour.
It is an illness that blights sufferers' lives (and their families' too), and it can and should be treated. In my brother's case, it was treated by changing his diet, not with drugs.
oldnewmummy, I sympathise with your dh. My brother was diagnosed at 13, but he had already lost a large part of his childhood.