If you think the smarter, more attractive sex is more socially prolific than us men, well ... you're right. Women use social media 9% more than men do. Despite having more distractions, people living in cities have the most social media activity, at 70% of the population. Perhaps it's the connectivity of large-city life. In terms of racial and ethnic groups online, Hispanics lead the pack at 72% engagement, with African-Americans trailing at 68%, who are ahead of Caucasians at 65%. And in a strange twist, despite being somewhat economically disadvantaged, 72% of adults with annual household incomes below $30,000 use social networks, more than those with higher wages. How about most popular social networks? That would be Facebook, with 67% of adults using the Zuckerberg-founded service. A distant second was LinkedIn with 20%, with Twitter coming in third at 16%, and Tumblr falling dead last at 6%. Get the full story at Mashable