Facebook vs Twitter Growth in the US. Twitter is expanding and FB is slowing.
#Facebook vs GooglePlus
INFOGRAPHIC: Facebook vs. Google: Talking Tech Talent
Twitter is Nearing Profitability, But Still has a Serious Growth Problem
20 recent statistics about Facebook
All about Facebook
US Twitter Users, Daily vs. Total, Nov 2010-Feb 2012 (% of internet users)
Stunning Ad Stats
What's the Best Time to Post on Facebook?
Quanto si usano i #socialnetwork durante l'orario di lavoro? #facebook #twitter
Twitter / yizmo: Who's winning the messaging ...
Google, Facebook Continue to Lead in Digital Display Earnings - eMarketer
Media, Tech & Us