Google+ passes twitter isn't great. Google+ is a newbie in this battle and its overtake twitter its shows google+ have all ingredients and quality to beat Facebook.
Google+ wont beat Facebook. Trust me. It is those who are not computer savy that will want to stay on Facebook instead of spending the time to go to Google+. Google+ is growing fast thought, 10 million users almost should be that by this weekend.
i don't think google+ plus can just easily beat facebook or twitter for that one, they already have their position..
I dont know who will be winner but definitely google + have edge over facebook. Privacy is very good.
I think Google always have the priority as compared to other owners. people will love to do what they want by using Google applications so I think Google+ will go further more as time spend..