http://www.spring.org.uk/2010/08/twitter-10-psychological-insights.php

1. Twitter is like a game of broken telephone
2. People join Twitter to follow their friends
3. Most tweets are babble:
1. Pointless babble: 41%
2. Conversational: 38%
3. Pass-along value: 9%
4. Self-promotion: 6%
5. Spam: 4%
6. News: 4%
4. The average age is 31
5. Men are Twitter leaders
6. 20 per cent are 'informers', 80 per cent are 'meformers'
7. Trends are one-time and short-lived
8. Average tweet frequency is 1
9. Existential angst can motivate users
10. Twitter is less social and more informational