Does Sheldon from The Big Bang Theory have some form of autism?

Yes, and you hit the nail on the head. Here is a subtitle from an article about the show: "Is the world ready for an Asperger's sitcom?"

Is Sheldon Autistic

I personally think they just created a stereotype of a geek and exaggerated his quirkiness for laughs. I think if he did have Asperger's it would change the show. Rather than having an air of superiority to his odd behavior, he would simply be someone who couldn't socialize typically. I think that by making him just quirky and weird makes him so full of himself and his intelligence that he can't conceive of a world where people don't think as he does or behave as he does. If they did make Sheldon have Asperger's, his inability to understand his faux pas would be limited, and so would the comedy of the show. I think his shock and consternation is the funniest part.

I did read the article posted above and I still like my theory better. I think the best part of Sheldon is the "this is how I am" attitude surrounding his quirks, which would be altered for the worse if instead it were "this is how my autism spectrum disorder forces me to be." It just wouldn't be funny.

I know for a fact he has autism. He is so obsessive and compulsive, but just like Rain Man, he is highly smart. But it doesn't make him crazy, his mom had him tested.