T-Bone,
You like video evidence that show Audis being slower than other rwd cars. Well here's the opposite, an M5 getting beat by an RS6 (both stock).
Here's another street race E60 M5 vs C5 RS6 (don't know if either is stock but then we don't know about M5Board events either)
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Next is another street race, R8, M3, RS4 and 335i
Here's a traffic light race between an M6 and an RS4, again the results speak for themselves.
I am sure you can counter these videos with your own showing the RS4, RS6 and R8 getting beat but what's the point, we aren't going to agree on any of this or the fact that Quattro does not sap anywhere near the amount of power you are saying it does.
P.S.
I am not a Fanboy for Audi, I have an M3 coming in September, I just don't agree that Quattro is the devil and it's the worst thing that ever happened to motoring.