A new study concludes that participatory Web 2.0 sites have less participation that initially believed. Less than 1% of users at Flickr and YouTube actually upload videos; the online encyclopedia Wikipedia had the most participation (about 4%) of the sites examined in the survey.
Individuals seem to be using the sites to browse for content, however. About 12% of website visits are to Web 2.0 sites, up 2% from one year ago. Web 2.0 photo sharing sites account for about 56% of visits to photo-related sites on the Web in general.
article at News.com