I had no clue what a printed facebook was until recently. I went to a community college that didn't have one of these and have never actually seen a real one. I'd be willing to be that the substantial portion of Americans which you speak of is actually the minority when it comes to knowing about the etymology of the word facebook.

On the other hand Google+ sounds like a better version of Google. Which I feel is more in line with their vision than merely an attempt at a Facebook killer.