Email use study

A 2010 report on digital trends found that Innovative social messaging platforms like Facebook and Twitter as well mobile communications continue to dominate online time, and web email begins its steady decline. Total web email usage was down 8% in the past year (YOY), with a whopping 59% decline in use among people between the ages of 12-17. Young people are simply spending more time social networking than anything else, up 3.8% to 14.% of all time spent online. In contrast, use of web -based email lost 1.5% at a total of 11% of time spent.
ComScore. (2010). The 2010 U.S. Digital Year in Review.
http://www.comscore.com/Press_Events/Presentations_Whitepapers/2011/2010_US_Digital_Year_in_Review