well the point isn't if it can improve performance, because if it does the developer would've done it already, we know Crytech isn't stupid.
i just don't like him talking bs pretending to be a coder or whatever when he couldn't understand the fact that PhysX isn't supported by all games. plus his lack of basic English,knowledge on CG technology scientific method and logical thinking all point to the conclusion that even if he has the source code he will not be able to do any optimizing at his current level of understanding.