In 2007, the percentage of Boomers consuming social media was 46% for younger Boomers (ages 43 to 52) and 39% for older Boomers (ages 53 to 63). By 2008, those number increased to 67% and 62%, respectively.
... Almost one in four younger Boomers (43-52) are active in social networks, up from 15% in 2007.
This matches my antidotal experience in the past year with coworkers, relatives and professional colleagues. Those in their 40s and 50s have been getting on Facebook and building networks of friends in droves. Have you noticed it?
New York Times also has story.