Oxford University researchers say the idea that people have thousands of internet friends is an urban myth. In fact, the average Facebook user has between 150 and 180 friends. But many of these are far from close - and on average we have only four real friends we can count on in times of crisis. 3,500 Britons were surveyed. The average number of friends on Facebook was 169. Women and younger people were particularly sociable. However, when asked how many of these they would ask for support when times were tough, the number dwindled to just four.
Source: Royal Society Journal