Sorry I was rather sarcastic but I really cannot see the difference in wether you have brains or not. Years ago(and I am thinking YEARS ago) women did not have the opportunity of education. They were housemaids or worked down mines, etc basically grafters or stayed home with the kids. There were still disabled children then as there are now. There were still disabled when there was no chance of education for men either. Just watched a programme on the hidden RF members as an example. There was the stigma attached too remember which undoubtably made a difference to how many were honestly diagnosed.
It could (to me) just be the fact that thankfully time as moved on over the years and we are all educated enough (wether it be degree or just plain old gcse) to actually spot that we can help our children hence why there are more diagnosed. Also womens opinion counts and so we are prepared to voice our concerns and get something done about it.
Sorry but I am more interested in the article about who wrote the dead sea scrolls on the right 