Texting by American adults has increased significantly over the past year, but still does not approach the level of text messages exchanged by young people, according to a new report from Pew Internet & American Life Project. Nearly three quarters (72%) of adult cell phone users send and receive text messages now, up from 65 percent in September 2009. The majority (87%) of teen cell users text. Teens text 50 messages a day on average, five times more than the typical 10 text messages sent and received by adults per day.