According to an article in  www.Gigaom.com : U.S. web users tripled the amount of time they spent on social networks in August from the same month last year, according to Nielsen. Estimated online advertising spending on social networks more than doubled over the same period. Around 17 percent of all time spent on the web in August in the U.S. was on social networks, up from 6 percent during the same period a year ago, suggesting that sites like Twitter and Facebook have not only grown their … [Read more...]