I don't know how much effect it had, but I used that technique in my old Audi S4 (the twin turbo model). For example, leaving a stop light on a 35 mph marked street, I would floor the gas pedal and use the manual shift feature of the tiptronic to work quickly up to 4th or even 5th gear. The acceleration would be brisk, but not law enforcement attracting, with very little noise from either engine or tires (thanks to a stock exhaust system and all wheel drive). As soon as I'd hit the speed of the street I'd back off the throttle and cruise from there. It's a very stealthy way to get rapid acceleration without the attendant "racing noise" of high engine rpms. Still barely managed to eek out 21 mpg on average though.
Of course, I can't use this technique in "the d" without leaving darkies all the way across the intersection!
Last edited by Pasa-d; 01-06-2013 at 08:30 AM.