I&#x27;ve read articles (that I can&#x27;t currently find) that talk about how different groups use Twitter very differently.<p>It&#x27;s more likely to be the primary social network, meaning the way you stay in touch with your real-life friends, for people who are younger or more immersed in the African-American community.<p>Also, Facebook has been taking some very direct shots at Twitter lately in the arenas of public and real-time posting.