The amount of time consumers spend on social networking sites is limited when compared with overall time spent on content-related Web sites, according to a new survey from Burst Media.

Research found that while 40 percent of 18-to-34-year-olds spent 11 hours or more every week online, only 3.5 of those hours are spent on social media sites such as Facebook and LinkedIn, according to Burlington, Mass.-based Burst Media, an online media agency.

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