Recently some sociologists from Facebook -- Facebook is the channel that you would expect is the most enlargening of all channels. And an average user, said Cameron Marlow, from Facebook, has about 120 friends. But he actually talks to, has two-way exchanges with about four to six people on a regular base, depending on his gender.

Academic research on instant messaging also shows 100 people on buddy lists, but fundamentally people chat with two, three, four -- anyway, less than five. My own research on cellphones and voice calls show that 80 percent of the calls are actually made to four people. 80 percent. And when you go to Skype, it's down to two people.