Fact: That's the majority of the US nowadays, at least half, can't say much for the rest of the world though.
I wouldn't say half. Far from it, probably. Atheistic and Non-Theistic are two very different things. Only about 2% - 4% of the world is Atheistic, last time I checked. This, of course though, is in adults that answered it. In teenagers, yes, Atheism seems to becoming prominent and even in younger adults. And though they are the future, nothing can guarantee if they truly believe in such, just as the same with any other belief.