Google Plus certainly *will* close your account, sometimes summarily, if you do not use your real name (or something that SOUNDS like a real name!) Some people still don't, and get a nasty shock when others dob them in, and sometimes, they make stupid choices, like not allowing, e.g. 'Terry and Kim Kovel', 'Martin and Aleta Curry' although now they have business pages, I suppose you could use those for 'double acts'!
I'm inclined to believe that Google + will be the business networking place, and Facebook the place to catch up with Aunt Tilly and see the latest pictures of her dog - or that girl you went to high school with's new twins.
People who are highly invested in Facebook seem understandably resistant, but since we came late to the Facebook game, and, as far as I can tell, the only people who make money via Facebook are the ones who sell books on how to make money on Facebook, I'm giving Google Plus a go.