The only thing in Brawn's favour is that the technical regs for next year are reasonably similar to this, so it's possible that most of their good performance will carry over. They have developed quite well this year, albeit in fits and starts, and they've certainly kept their noses in front more consistently than expected. Once RBR caught them up, around the time of the British GP, most of us thought they'd continue to be left behind but that hasn't been the case. If anything RBR have faltered more than Brawn, and very disingenuously they've blamed the Renault engine. The same engine that's given them two 1-2 finishes this year.