I never believed it. But having used orkut, its seems more and more a possibility that people all over the world are connected to each other with atmost six peole between them.
Consider this, I was able to link back to my brother, whom I had not added as a friend, through my group mates here at ISB. Even most of my other friends from school are connected through at least one of my group mates here. Just wondering, would this have been possible before the advent of the internet. And I haven't had to go beyond 3 intermdiaries yet.