Google+: hollow circles
22 March 2012
Google+, the social network, has around 100 million users worldwide, although user growth appears to have stalled and usage is low on weak network effects
Facebook users, now 70% of the adult internet audience (excluding China), have no incentive to switch to Google+, starving the social network of vital momentum
Facebook is likely to dominate socially enhanced search, unless Google+ takes off, which seems unlikely