Does one need graphs or any particular smarts to know this? If 500M people are on FB, it seems obvious that the double-digit growth trend would have to abate.

Does one need graphs or any particular smarts to know this? If 500M people are on FB, it seems obvious that the double-digit growth trend would have to abate. Sorry for the haterade comment, but I don't know why we need "research" to uncover these master of the obvious trends.