No surprise: The long tail means that the top 10% Twitter users accounted for over 90% of tweets (this is the same distribution I've noticed in my student blogs, though my prolific students are also more likely to write *longer* posts, rather than *more frequent* posts)

Just as most blogs are apparently dead, most Twitter users are one-timers: "Among Twitter users, the median number of lifetime tweets per user is one." If I read the stats right, about 20% neither follow anyone nor are followed by anyone. (Can we really call that person a "user"?)

Thought-provoking:

* Men have 15% more followers than women
* An average man is almost twice more likely to follow another man than a woman
* An average woman is 25% more likely to follow a man than a woman
* Men represent 45% of Twitter users
* Women represent 55% of Twitter users

http://blogs.harvardbusiness.org/cs/2009/06/new_twitter_research_men_fol...