Interesting blog post over on the Harvard Business Conversation Starter blog about the results of a piece of analysis on 300,000 Twitter users.
Of our sample (300,542 users, collected in May 2009), 80% are followed by or follow at least one user. By comparison, only 60 to 65% of other online social networks’ members had at least one friend (when these networks were at a similar level of development). This suggests that actual users (as opposed to the media at large) understand how Twitter works.
It seems men are more likely to follow other men and the 10% most prolific Twitter users account for 90% of the tweets.