I can understand where you are coming from though CoxRox, but comparing String theory to a creator ignores all the notions of String theory. Firstly, strings are vibrations of energy, and we know that energy exists. They extend into other dimensions, and we know dimensions exist (we live in 3 of them and travel along the fourth). Secondly, strings aren't given any intelligence, which a God apparently has, so they don't need to explain the origins of their being, and strings aren't given any degree of moral or otherwise control over us as a species. They simply hold together reality in a natural way.
So all in all, I'd say a creator is much more unlikely than string theory, even when you accept that string theory is unprovable.
So all in all, I'd say a creator is much more unlikely than string theory, even when you accept that string theory is unprovable.