Two Tweets is one too many, for half of Tweeters....

From Reuters...

"A tiny fraction of those who use the fast-growing social network phenomenon Twitter generate nearly all the content, a Harvard study shows. The Harvard study examined public entries of a randomly selected group of 300,000 Twitter users... The researchers studied in May the content created in the lifetime of the users' Twitter accounts. It found that 10 percent of Twitter users generated more than 90 percent of the content, said Mikolaj Jan Piskorski, who led the research. More than half of all Twitter users post messages on the site less than once every 74 days.The median number of lifetime "tweets" per user is just one, according the research..."

The conclusion is that Twitter is currently being used as a one-to-many communication, with many people following a few.