*WHY* 1/10,000 births forty years ago to 1/154 births today ???\r\n\r\n
NIMH's "conservative estimate" for autism is currently 2-6/1000. The "one in 150" is for "autism spectrum disorders", which are an extremely broad category including everything from Rain Man to folks who act "normal". And note that Asperger's, which is trying to displace ADD as the "of course there's a medical reason why your child isn't paying attention in school" diagnosis, is an "autism spectrum" disorder. Which, in the end, does a disservice to the real thing.