There is more to this than just Rossi vs Stoner.
It seems to be a front end issue, which might mean that even the few kilos difference in weight between Rossi/Hayden, and Stoner, is enough to change the bike from a might-lose-the-front-end-if-pushed (Casey), to will-lose-the-front-end-if-pushed (Hayden/Rossi).
If Burgess/Rossi cannot fix the issue, then who can?
I have no brand loyalty, so I'd love to see them all on the best bike, which at present, seems to be the Honda.
So, if it were all Honda (or Yamaha, for that matter)....I can see Stoner/Rossi/Lorenzo/Pedrosa all up front, with Spies hard on their heels (if not with them).
To recap, this is a machine issue, and as the difference between winning and losing is so miniscule, adding a fwe extra kilos of rider weight to a front end issue might just make all the difference.