The effects of social networking

There was an article in the Daily mail the other day suggesting that social networking sites are harming children's brains. Within this article they go on to say that it has been proven that children that use social networking sites on a regular basis have shorter attention spans than children who don't.

http://www.dailymail.co.uk/news/article-1153583/Social-websites-harm-childrens-brains-Chilling-warning-parents-neuroscientist.html

I have also managed to find a video on youtube discussing the matter.