Does the world's smartest man, Edward Witten, believe in God? It's been said he's the smartest man since Aristotle.
What does it matter? If he believes in God, should we then all believe in God? If he doesn't should we not? Who cares what this guy thinks about religion? He is an expert in Physics, not Religion.
I'm not sure this discussion will go very far. As mattmns has stated, what does it really matter? I can only see this thread descending into a religious debate.