The average social-networking user around the world spent more than five and a half hours on sites like Facebook and Twitter in December, according to data released Monday by Nielsen. That marked an 82 percent jump from December 2008 when Tweeters and Facebookers surfed their favorite sites for around three hours the entire month.

Among all sites and applications on the Net, social networks and blogs proved the most popular in December, followed by online games and instant messaging. Now boasting 206.9 million users, Facebook was the top social-networking site in December, says Nielsen, grabbing 67 percent of social networking users throughout the world.

Among all countries, the United States led the way with the largest number of people checking out social-networking sites at 142.1 million unique visitors. Other countries at the top of the list included Japan with 46.5 million social-network users and Brazil with 31.3 million.

More: http://news.cnet.com/8301-1023_3-10457480-93.html

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