they guys over there on FB are afraid of google's new avatar so called google plus. They know that google plus can beat them to the ground in no time so no wonder that they are doing their part to stand on top of social networking field.
Well, it'll all come down to whoever has the most resources and money - who can promote more. Google is still years away from catching up to Facebook, but Google can launch commercials and such on TV if they wanted to - and that would give FB a run for its money - depending on how long they let the commercials air, or, they could launch advertising through certain keywords. It's all open game, but we'll see who will come out on top in the end.