Had a chance to "fully exercise" the S5 today. I am *very* impressed. It's one thing to make a car handle like that, and another to make a drivetrain that works that well. It's a whole other ball of wax to do both so well in a 3900lb car.
I had a heavy German coupe, that admittedly is a good portion "luxury" despite its sport badging, in a full-on 4 wheel, full-throttle drift. Thoroughly impressed.