Does the story of Koch have any effect on Raskolnikov?

I do not believe Koch's statement effected Raskolnikov. The novel is about his struggle of proving to himself that he is an "extraordinary" member of society able to transgress moral law. Obviously he never was and no one is able to transgress moral law. Raskolnikov would have felt his guilt anf fear of imprisonment regardless of Koch's testimony because he is not superior. If anything, Koch may have increased the omnipresent fear within Raskolnikov of beinf mediocre, but there was no real importance.