The amount of time people spend online has not increased since last year, according to Forrester
The report, titled "Consumer Behavior Online: A 2009 Deep Dive," shows that overall time spent on the Internet has remained at 12 hours per week.
http://news.cnet.com/8301-1023_3-102...orsPicksArea.0
In the U.S. alone, total minutes spent on social networking sites has increased 83 percent year-over-year
-Nielsen Online
http://www.nielsen-online.com/pr/pr_090602.pdf
so the same amount of time online and the social networks are taking up a bigger chunk of it