It’s an interesting theory, but I see one fatal flaw: the clumsiness associated with aspies would be fatal for a hunter, wouldn’t it?
(And I say this as someone who’s immediate family believes he’s on the spectrum)
The clumsiness may be a condition caused by two conflicting genes that would not be present in a pure Homo sapien or pure Asperger’s man. Also the clumsiness may be a product of heightened senses (you get something, something is taken away there is no free lunch).