I have a friend whose daughter was labeled as autistic. Her mother just rolled her eyes over it and said it was the new designer disability. She disagreed with it. Her daughter didn't have social skills that matched what is considered normal for her age but she talked to people, made eye contact, and made friends. Just a typical geeky kind of kid; which is why her mother disagreed with it.
There are also lots of kids that have speech problems like my daughter that are diagnosed (wrongly) that they are autistic.
These kids are shy and don't have great social skills because they can't talk.