From my personal experiences in life, having known people with autism, I can say that it's truly impossible to know if someone is autistic from a video game. I have seen autism in ALL forms. I have a friend with Asperger's. The only way you'd ever know he even had autism was the fact that he gets very closely attached to things, and even that would take some time to pick up on. However, I've seen autism cases where people never utter a word, or never shut up, or babble incoherently. I have seen people with autism who's intelligence and diction could put everyone I know to shame. The point is, it shows up in so many diverse ways, that if someone really had it, there'd be no way to know.