[betterlabs]

I already discover most new content via Facebook and the only missing piece is search. If Facebook builds a search engine and integrates within its core experience sooner than Google takes to get G+ to work and scale, it would be a good indication of who might eventually win. From the social perspective, Facebook already has the mental association at a massive scale that may be tough for G+ to get to, especially considering Google is perceived to be "more utility than fun" across its user base.