Neilson Research: Teens Don't Tweet

“'Teens Don't Tweet; Twitter's Growth Not Fueled By Youth,' the Nielsen Company reported in a finding. . .Nielsen based its claim on data from a panel of 250,000 U.S. Internet users. People under 25 make up 'nearly one quarter of the active U.S. Internet universe,' but in June of 2009 that age bracket accounted for just 16 percent of Twitter.com Web-site users, the market-research firm reported."