It’s no secret that Twitter is catching on in France, but an analysis from November suggests a surprising group is leading the way: users 55 and older. According to comScore Media Metrix, the number of visitors to the Twitter website from members of that age group increased 100% last year, to 1.3 million.Despite social media as traditionally the province of younger individuals, the 55-and-over crowd is better represented on Twitter than any other age group. The next largest demographic of Twitter users in the country is the 15-to-24-year-old set, of whom there were 1.2 million, representing an increase of 62% over 2011.