What possible advantage is there to having any form of autism?

Speaking only for myself:

Logical thinking is really easy for me. Also abstracting, pattern matching, "out-of-the-box" thinking.. Loyalty, honesty and helpfulness are also positive traits common among autistic people.

Having a unique worldview certainly is helpful in some situations. However it also makes other situations, especially pertaining to social interactions with strangers, rather challenging at times..

Greater general logical reasoning ability. Also, many people with ASD resent 'NTs' ((N)euro(T)ypical people), and view their existence with—not animosity, but as something they would not like for themselves.

Sounds like sour grapes more than anything, honestly

Isn't there a correlation between Asperger's and high IQ?

AFAIK that's just because an Aspergers diagnosis requires an IQ>70.

Does that translate at all to general life satisfaction?

Isn't having a satisfying life subjective?

Yes, but that doesn’t mean we can’t measure subjective enjoyment, and associate higher subjective enjoyment with certain life circumstances.