You don't need a lot of social skills to know that when people ask you what you do, they probably don't want to hear the abstract from your latest paper, but will be quite content with "oh I work at the university". The only reason any one will feel diminished around you is because you go out of your way to make them feel that way.

I know several very smart people with PhDs in very complicated things, working on very hard cutting edge research problems, and they don't have a problem hanging out with people from a wide variety of backgrounds.

The whole "no one likes me because I'm too smart" smacks of lies mothers make up to make their anti-social kids feel better about being bullied at school