Wo, the evidence truly is compelling. Even if Nick isn't Satoshi "Himself". he's at least one of the main collaborators. I mean if you were creating something complex and advanced like bitcoin, wouldn't you seek out the world's leading expert on the topic to help you with it (assuming you have the resources to do so)
Actually, a compelling theory is that Nick Szabo (possibly in collaboration with others) is Satoshi Nakamoto: http://likeinamirror.wordpress.com/2013/12/01/satoshi-nakamo....