DS's neuropsych would say that "quirky" is not the same as autism. It's only a disorder if it causes the person significant social issues and there is a pattern to the symptoms. If you added up all the people who have trouble with eye contact or display any other flag for ASD, probably the majority of us would have autism.

When I was a kid I probably should have been put into a social skills group since I was very shy. But I don't think having a social skills deficit equates to ASD.