I would say yes for a few reasons.
Google has changed the face of search as we know it, whether that's a good or bad thing is up to the user's discretion. They have now released a product that is taking on giants like Facebook and Twitter, and if all pans out correctly for Google again, they might change the face of social media as we know it as well.
Since right now they are in their testing phase, its initial users are all in way shaping the direction it goes, as well as providing feedback on the current implementations on Google+. Seeing as they do extensive user testing and research (including the current testing), their products reflect some of the newest and most up to date user testing that has been documented. (How many times have you seen 10+ year old studies posted on answers to questions on ux.se?)
We have some very talented people on this site, and I feel that their expert opinions/fact checking/observations would be very useful while taking an in depth look at Google+. While a bit on the "chatty" side, I think with Google's impact on the internet and widespread effects on internet standards and innovation warrant the survival of a question like this.
Update: In addition to the Google+ question, the questions about Facebook, iOS and Kindle should be valid, seeing as they have a great deal of market penetration and have become the standards (not the only standards, but major ones) in their own rights.