Isn't Stephen Hawkings a proclaimed atheist? But it doesn't answer your question what most are. However, I feel most teens don't even really think about those kind of things, albeit the universe, why we exist, does God exist etc.. I was one of those teens when I was younger, I felt like I was one of the few. Even in my 20s most people around me don't even watch the news, and are oblivious to current events around them. So in essence, my conclusion is no they're not. They are preoccupied with less significant BS.