Good aggregation of data by Esteban. Below are a few notes:

– Ranked by growth, India (51.7%) and Indonesia (51.6%) are the Top 5 social networking countries, followed by India, Mexico and Brazil.

– Only 16% of Facebook “fans” see posts. Make sure that is communicated to stakeholders when you report your Facebook reach.

– U.S. Social Media ad spending to reach $9.8 billion by 2016, challenging traditional advertising and threatening display ad growth.

– Google+ has 150 MM monthly active users after only 1 year, less of social network more of a SoLoMo layer.
– Since December 2011, YouTube views have dropped by 28% while YouTube tries to be a TV-like appointment viewing platform with their premium channels.
– 75% of U.S. Smartphone owners regularly use location-based services.
– Pinterest visits are slowing down, just like the number of users of FB Connect. A correction or a trend?
– “Social Business” shifting from buzzword to market reality.