• Mashable, Thursday, March 11, 2010 2:26 PM

Just 1-in-5 Twitter users are actually "active," according to a new study from security firm Barracuda Labs (using a very generous definition of "active"). The study tracked roughly 19 million Twitter accounts, and deemed active, or "True," all those that had at least 10 followers, followed at least 10 people, and had tweeted at least 10 times.

What's more, only 26% of Twitter users had 10 followers or more by December 2009, while only 40% were following 10 people or more. A majority of Twitter users, 51%, were following less than five people. Meanwhile, 34% of Twitter users hadn't sent a single tweet, while a clear majority, 73%, had tweeted less than 10 times.

Read the whole story at Mashable »