This infographic provides a different angle on the use of social networks, with insights into the demographics of the average user base. Overall Male/Female ratio is fairly even with usage by males at 51%. And females at 49% The oldest (65+) demographic social networks include plaxo.com and newsvine.com, while the youngest (0-17) include habbo.com and imvu.com. The social network with the richest user base is linkedin.com, with the average user earning $150k+.
The social networks that are winning the race include the blogging platform Tumblr, which has seen its biggest growth in 2011 and Weibo, while MySpace is still in its decline followed by Friendster.
Infographic source: http://www.ignitesocialmedia.com