According to the Pew Internet and American Life Project, 26 percent of adult Internet users have posted such a rating. More experienced and active users were more likely to have done so, as were men and younger adults.

"The more voices that are in the mix, ... the better off everybody is," said Lee Rainie, director of the Pew group. "There's more wisdom in groups than there are in individuals no matter how expert they are."

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