Well, I have to agree with him on this:

Fine. But it produces only 429bhp. That’s just a gnat’s more than you get from the V8 in an RS4, and it’s nearly a hundred less than you get in a Lamborghini Gallardo. Why? Audi owns Lamborghini so it’s not as if the Italians have “lost” a hundred horses as some kind of latter-day payback for losing the war. And it’s not like the Audi boffins were wary of what happened the last time a mass-production car was given a monster engine . . .

I saw the S6 Avant several times and it's really a sleeper. I begin to also think that they should name it A6 5.2 instead. Cause it's not THAT super, to be called an S. 435hp from a V10 has been and IS disapointing.
Waiting for the RS6.