I've just returned to Audi after a few relationships with BM oil burners. The return has me in an '09 S4 and to be honest, I think it's deceptively quick.
There's a very linear delivery, though it appears to be often untapped with the standard shift pattern of the DSG box. The onset of that delivery is silky smooth, which makes swift progress appear to be effortless, till static landmarks, or terrain changes make it apparent.
There is a definite drop off of power too early in the rev range which I'm sure a remap will address, already spoken with Revo and also MRC ...decisions decisions. My vehicle does has the ADS with steering, suspension, sport diff etc, and I think I'd have been disappointed without these extras as they transform the car in my limited experiecne when your looking to hustle it along. The rear diff in particular really seems to help the car tighten up it's line mid and exiting bends. Are these needed for day to day driving, of course not, however as a used buyer, you have the luxury of being as picky and patient as you see fit - I'd have to say get these items - even the adaptive steering, once you are famialir with it isn't so unpredicatbale as initial exploration of it.
But back to your concern, I don't believe they are slow - then again don't expect it to appear significantly quicker than your RS of course
