Like other online pastimes, age is a strong, independent predictor for use of Twitter or other similar status-updating services. Among internet users ages 18 to 24, 37% use Twitter, up from 19% in December 2008. Roughly three-in-ten online Americans ages 25 to 34 tweet, up from 20% in December. Older adults are far less likely to be on Twitter, with roughly one-in-ten internet-using adults between the ages of 45 and 64 tweeting. The median age for a Twitter user is 31, roughly where it was in December when fewer people were on Twitter. By comparison, the median age for a Facebook user is age 33, for a MySpace user it’s 26, and for LinkedIn it’s 39. Read More