A new Yahoo research study reveals that approximately 50% of tweets consumed come from only around 20,000 Twitter users.  The study classifies Twitter users as ‘elite’ – including media, celebrities, organizations and bloggers – and ‘ordinary’ (everyone else).

Main findings:

• media users produce the most information
• celebrities are the most followed
• celebrities ‘overwhelmingly’ listen to other celebrities
• bloggers listen to other bloggers
• bloggers generally rebroadcast more information than the other categories
• ‘elite’ users generate significantly more retweets than ‘ordinary’ users

The researchers also conclude that Twitter resembles an “information-sharing hub” more than a social network, as reported by Mashable.

Read the full Yahoo research study here: “Who Says What to Whom on Twitter”