Twitter - silent crowds
A recenty study among 300.000 Twitter users show that just 10% of them generate more than 90% of the content.
“Based on the numbers, Twitter is certainly not a service where everyone who has seen it has instantly loved it,” said Bill Heil, a graduate from Harvard Business School who carried out the work.
On a typical online social network, he said, the top 10% of users accounted for 30% of all production.
“This implies that Twitter’s resembles more of a one-way, one-to-many publishing service more than a two-way, peer-to-peer communication network,” the team wrote in a blog post.

Read the full article from BBC News here.