when side by side and the guy was sprinting and i looked directly at the ground i could tell.
i find that an absurdly convoluted set of criteria to "notice" the difference and a waste of resources for the game. give me 30 fps and a game with better draw distance, textures, poly count, npc count, resolution or really anything else. anything else is more impactful to the overall experience to me than the framerate increase beyond 30.