Internet data usage is up 120% Y-o-Y in H2 2012 the US

"Internet data usage is up by 120% in North America
Netflix continues to dominate North American fixed networks with 33% of bandwidth share
Asia is the world leader of mobile data consumption with monthly usage of 659 MB, up by 10% in the last 6 months
YouTube represents more than 20% of peak period downstream traffic on mobile networks in Europe"

Source:  Data from Sandvine, November 2012