Babyboomers fastest-growing demo on facebook

What's the fastest-growing demo on facebook? Babyboomers (55 and over). DC, then Chicago, were biggest cities.

From the article:

Researcher iStrategyLabs just released new numbers on Facebook user demographics, and one figure stands out: the number of members who are 55 and older grew 25% in the last month alone. The segment more than tripled the overall rate of growth for U.S. users on the site in the month ending August 4, which was 8%.