Facebook is for the masses, like you are in a crowd or discoteque, where you can meet anybody meet your friend's friend's friends,...etc,
Google+ is different, it is more closed, more natural. It is more intimate. It is not so unreal like Facebook. Facebook is crazy i think, It would be banned in years to come probably, communication is on steroids.
I like Google+ more but it is more quite ('boring' ;-)) place comparing to FB. It can happen Google to be inpatient because of ratings and ruin Google+ by forcing people to much into communication.
Google just has to make easy progress with Google+ and adding new features and slowly gain popularity.
Facebook is to crazy, people use it just because everybody use it. Google+ could be used because it is good.
Just nice and easy.