When people "self-diagnose", it's often a lightbulb moment. Folk who have felt uncertain about their social interactions, communication and imagination suddenly find their proclivities fit a pattern, which of course comforts them. If you include Asperger's which is generally considered to be at the milder of end of the same spectrum, the estimated incidence is well over 1% ; if you include ADHD as
some do, then it's up towards 5%. I don't know if there are figures for little ba$tards who need a hiding or bloody awful parents, or how those two groups correlate, but I suspect they blur the numbers.
Autism generally is far more prevalent in males. There's genetic work ongoing, and suggestions of therapy using stem cells. Milder cases go without a professional diagnosis of course which has a strong pro-male diagnosis bias, so the estimates on ratio of male to female incidence are dropping, from 5:1 to maybe 2.5:1 though the patterns of maladaptive behaviour between the sexes vary.
A psychologist told me that when explaining a lad's patterns of behaviour to anxious parents, the dad will often at some point say, "You're describing me"
. He also openly discussed his daughter, who was about 8, and in the room. The lass exuded intelligence, with a deep understanding of things well beyond her years. She said she knew she was different and was ok with it.
Dad was about to speak at a symposium about work he'd done on inheritance:
In his words, geeky parents produce geeky kids. He was a geek, and his geek wife worked in medical physics, on algorithms for imaging in MRI scanners. His theme was that a generation ago, a woman would have been unlikely to have ended up in a geek job like that, and he wouldn't have met her, in their medical geek circles. With more women in geek-appropriate jobs over time, we get more, more geeky offspring. Could be.