Facebook Glitch Revealed Thumbnails & Descriptions Of Friends’ Private Videos
techcrunch.com
techcrunch.com
For that reason, I don't think plus needs comparable penetration to compete. The critical mass needed to get a single user to switch the network they are a more active on isn't the same as the mass needed to get everyone to do so.
If I go look at my feed on facebook, I can already see the makeup of my 'top news' changing because most of the people I actually give a shit about are already on plus. Its less that 20% of my "friends", but 5 or 10 more people and everyone I care about interacting with will be there.