[Zeke]

There is a lot to agree with here and I do agree. Interesting that only John mentions racing with the post on the Mercedes dyno. My idea of throttle response is if you can drive the car in a corner with the throttle. A turbo, or turbine for that matter, comes on too late to use the throttle positions to turn the car. Of course this all depends on how the car is set up and if it responds well to the gas-o-meter. Think of a dirt oval racer. Driven with right foot and two hands. Poor throttle response would make the dirt car undriveable. IMO, response is how quickly the car reacts to the input.

Now driving a 911 in a corner with the throttle? Just let off real fast and see the world turn around. That, folks, is throttle response.