Wooga and Electronic Arts have announced their intentions to pull their games from Google+. The decision from two of the five largest social gaming companies comes as a result of the network's struggles in engaging users, and the larger audience available on Facebook.
The vast majority of people I know out of webmastering and the Internet have no clue or interest in G+. It appears to me that G+ has a foundation in the tech industry, which is probably, as you say, viggen, as with orkut.
G+ is nowhere near being as well recognized as Facebook and non-webmasters don't really want to maintain multiple social networks. Google gave it a good shot with integrating it into their everything, even search results, but it's just not catching on with anyone I know who isn't a webmasters.
Trust issues and a lowered opinion of Google in general are rearing their heads, imo.