I found a reference somewhere that indicated the 'Amish' community has
one of the lowest diagnosis - i don't want to stereotype a group of people
i know very little about, but are they unlikely to report possible cases?
I would have thought though, that they use a limited gene pool,
perhaps that is the reason?
Maybe they have a life that "simple", that it isn't that mindboggling to get the social rules enough to go unnoticed.
Also, in small communities you can't ostracise all. Everyone has a function to make it work, spazz or not, there are creative niches to be filled.
Can be very suffocating, a small community, but there are good things to it too.
For someone with the need to have the right to doubt everything, living in an Amish community would not work of course. They would leave, diagnosed or not. And, because they left, they would not raise the percentage of diagnosed ASDs.