It would certainly make sense that the early adopters of social media, the 18-24 year old would make up the largest segment of Twitter users. Guess again. According to Comscore’s recently published article by Sarah Radwanick, “45-54 year olds are 36 percent more likely than average to visit Twitter, making them the highest indexing age group, followed by 25-34 year olds, who are 30 percent more likely.