Do you consider MENSA members to be arrogant?

My own personal belief aside that anyone who has such a high intellect should actually use it for the betterment of mankind as opposed to simply declaring it by joining a group, most of the "Mensans" I've met are really quite arrogant. They believe the ability to solve a few puzzles that most are unable to figure out makes them superior, and they believe anyone of slightly lesser intelligence to be retarded. Any thoughts?