According to a Harvard Business School study, about 10% of Twitter users
contribute roughly 90% of its content. Anecdotally, these 10% are
subject-matter experts, passionates, mavens, and thought leaders who break
news, write strong opinions, and tell jokes. Like on Wikipedia, most users merely
read this information, and a modest number of people in the long tail use the
information in the form of re-tweets, comments, corrections, and alternative
opinions or links.
(via O'Reilly Radar)
