I'm constantly posting G+ links on my Facebook and Twitter accounts, especially to Facebook.
I prefer G+ over Facebook hands down and have noticed that there is a lot more private sharing among those I've circled than public sharing. That may lead to an impression that it's a ghost town to those who are new and haven't found a series of communities. I've even moved a political social network from Ning to G+ and we share privately with one another and use it for collaboration purposes.
Regarding the video that shows "Surface vs iPad", +Alexandre Romao said, and I quote, "I think everyone clearly noticed the big difference here, Steven Sinofsky (Presenting Surface) didn't wear a black turtleneck ! That was so obvious."