I understand why teens might not tweet, but I thought this sentence was strange: "Teens' lives are entirely built around their actual friends. Quite simply, why

I understand why teens might not tweet, but I thought this sentence was strange: "Teens' lives are entirely built around their actual friends. Quite simply, why would teenagers bother using Twitter when Facebook exists, and offers so much more?" Since when have all of a teens' (or anyone's) Facebook "Friends" corresponded to real "Friends". Oh, I know some are, but really, most are not.