Twitter Use Climbs to 13% of Adults Online in the U.S.

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Twitter Inc., the social-networking site that lets people share 140-character messages, is now used by 13 percent of U.S. adults online, up from 8 percent in November, as more older Americans embrace the service.

Among Twitter users who own cell phones, 54 percent have used the mobile devices to access the social-media service, according to a report today by the Pew Research Center. Twitter use has more than doubled since late 2010 among people ages 25 to 34, to 19 percent, and increased among adults ages 35 to 44, to 14 percent. Usage for those ages 55 to 64 doubled to 8 percent.