I would assume that evaluation includes all of Facebook, not just the core portion.

I find it hard to believe that it is worth 2/3 of what google is when the revenues are 6 times lower, less diversified (if you can call oculus rift an investment). Printing money seems like an overstatement, they are financing it largely at a cost and I just don't see how you can monetize what essentially is facebook, a free chat device inferior to skype.