The Pew Research Center has had a more detailed look at the rise of Twitter as a communications tool in the United States.
Its conclusions are interesting: Twitter is fast-growing (up to 11 per cent now), popular among younger people (average age 31) but not the youngest of the young, bloggers are more likely to Twitter, and Tweeps are more likely to read blogs. What's most interesting is the mobile-friendly preferences of the user base.
"In conclusion, Twitter users engage with news and own technology at the same rates as other internet users, but the ways in which they use the technology -- to communicate, gather and share information -- reveals their affinity for mobile, untethered and social opportunities for interaction."