We have some stats, which may or may not meet your desired standards of rigor.
(I didn't take the poll back then. I'm diagnosed with Asperger's, but usually say "autism" instead, because the word is prettier and because it's all spectrum-y.)
Excellent. And of course, any poll thread on lesswrong will be 10% poll and 90% arguing about bias and rigor.
Since you volunteered the info, do you have any particular notions about how lesswrong and/or rationality have interacted with your autism? Though I personally suspect this sort of thing is in general difficult to analyze in that manner.
I am turning over in my head an idea for a discussion post. This preliminary post has two main purposes: