From the summary: "As of February 2012, some 15% of online
adults use Twitter, and 8% do so on a typical day. Overall Twitter adoption
reamins steady, as the 15% of online adults who use Twitter is similar to the
13% of such adults who did so in May 2011. At the same time, the proportion of
online adults who use Twitter on a typical day has doubled since May 2011 and
has quadrupled since late 2010—at that point just 2% of online adults used
Twitter on a typical day. The rise of smartphones might account for some of the
uptick in usage because smartphone users are particularly likely to be using
Twitter." Read more
