I love data visualization. Here is a great one from a recent post by Jesus Diaz from a book coming out October 27: Visualized, the Information Atlas, written by David McCandless. It looks like the 80/20, or in this case the 90/10 rule applies. Only 5/100 people have more than 100 followers, and the same amount are responsible for more than 75% of all tweets. The original article is available here.