The proverbial "six degrees of separation" was first proposed in 1967 by sociologist Stanley Milgram. Milgram asked 96 randomly selected people around the country to send a piece of mail to an acquaintance, who would send the mail along to another acquaintance, in an attempt to reach a designated "target" person in Boston. The messages that actually made it to their destination passed through an average of six people. But Milgram’s experiment was fairly small and has since been questioned by some sociologists. Peter Sheridan Dodds and his colleagues at Columbia University conducted a modern version of this study on the Internet, recruiting over 60,000 participants from 166 different countries for the experiment. For a more detailed explaination see this web site.
As far as Teitel is concerned, the details of what he has done over the past ten years are slowly coming out, and everbody that knew him are in total shock.