In addition, the study found that men are slightly more likely to use the service than women. Fourteen percent of online men in the U.S. use Twitter, compared to 11% of women.
Twitter adoption is also higher among non-white Internet users, proportionately speaking. A full 25% of online African Americans and 19% of online Hispanics use Twitter, compared to 9% of whites.
African Americans and Hispanics are also more active on the service; an impressive 10% of African Americans and 5% of Hispanics in the survey say they use Twitter on a daily basis, compared to 3% of whites.
Twitter and mobile also go hand-in-hand; 95% of Twitter users own a mobile phone, and half access the service from their mobile device.
The study was conducted between April 26 and May 22, 2011 among 2,277 U.S. adults.