I think it's way too early for anything like that to come out. H1N1 vaccines were primarily administered between October and December (at least where I live), so it's only been 9 months. Autism spectrum disorders are not typically diagnosed until close to age 2, before that it is considered a "developmental delay" and early intervention coupled with other therapies are used to try to help the child overcome the delay. If the delay persists, or other symptoms are noticed, then further testing/evaluation would be conducted and Autism spectrum considered.
So any babies of mothers who received H1N1 vaccines are probably only now starting to show gross or fine motor delays, if there are any. The social and speech/language delays may not be evident for another several months. And by then, if the family is a vaccinating family, the child will have received their doses of this year's flu vaccines, plus the other vaccines on the schedule, plus all the other environmental exposures that children are subjected to, so who knows what is to blame anyway?