It's of course a rather crack pot assumption on the surface. However, I started doing some research on Google and there's quite a few posts, articles and blogs about the subject. The usual suspects are trotted out as evidence that humanity has benefited from autism - whether it's evolutionary or a life long affliction. Names like Einstein, Newton, Gates, etc. - the ones who pushed human knowledge further than their counterparts and aided our evolution to where we are now.
Personally, I think the concept is a crock, but it does make for a good research session on the internet. There's a lot of stuff out there to at least make you consider it.
Have a look at this video before you go:
"We're the future, Charles, not them" - Magneto to Professor X in the original X-Men film.