I guess that this chart shows what we aleady know. Brawn will win and RBR will be second. That in itself is evidence of a very unusual season. McLaren have almost caught Ferrari after trailing them all year. This is ample evidence of Massa's absence. Toyota is close to the Macca/Ferrari battle and could catch them, but I would not bet on it.
Wlliams have flattened out their performance, recently notable because of Rosbergs pit exit debacle, and have also been almost caught up by BMW and Renault. Force India had a splash, but will they splash again? I don't think so. And STR has taken the back having no splashes whatsoever.