Does programming cause Aspergers? :-)
While people who have the symptoms of Aspergers are often drawn to programming, I think the process runs in reverse as well. In addition to the fact that time spent programming is time spent not gaining social skills, programming requires the adoption of a mindset that increases Asperger-like thinking, and the mind is quick to rewire to function optimally in a new environment.
I do wonder whether pair programming techniques mitigate this effect to some degree.