A report came out this week about Twitter, regarding how users new to Twitter use the service, a STATE OF THE TWITTERSPHERE, if you will.
In short, the conclusion is that the vast majority of Twitter accounts are inactive at best. Some users sign in and tweet just once, resulting in an “ORPHAN TWEET“. If you happen to run across one yourself, feel free to retweet it with the #orphantweet hashtag.
The bigger question, however, is how prevelant are these orphan tweets? Consider this: as in real-life, so goes Twitter: the top 10% of the most active Twitter users account for over 90% of the overall Twitter traffic.