Well, that's assuming people actually believe what Google. And even they believe what Google says, they don't have any compelling reason to switch from Facebook

Well, that's assuming people actually believe what Google. And even they believe what Google says, they don't have any compelling reason to switch from Facebook until their friends actually do switch. What I mean is that even assuming that people believe google's statement of "it's not a ghost town anymore", they are probably not going to move until it actually stops being a ghost town.