At the moment I'd pretty much agree with this.
Only difference is that I would put Williams down 1 teir, and add HRT to the Caterham and Marussia.
I also think that this will change quite a bit during the season as some teams get on top of the car and bring updates, and others fall behind. I still think it'll be between Red Bull and McLaren all season long.
imo, with qualifying and race pace both implemented i would say its:
Mclaren
.
Red Bull
.
Sauber
.
Lotus/Mercedes
.
.
Williams/Toro Rosso
.
Ferrari/Force India
.
.
.
.
Caterham
.
.
.
.
.
.
Marussia
.
.
.
.
.
.
.
.
.
.
.
.
.
..
.
.........................
HRT