The majority 53.

1 of Internet users belong to at least one social networking site, but the amount of time spent on the sites is somewhat short, compared to overall time spent online, according to a new report from Burst Media.Among 1834 year olds, 40 percent spend less than 30 minutes per day on sites like Facebook and MySpace. The top content categories for that demographic actively seek out entertainment news 48.6, gaming 40.