[TTopJohn]

Even at part throttle, doesn't reducing pumping losses in other areas result in a gain in power and efficiency? The throttle is still a restriction, but with reductions elsewhere, a smaller throttle opening might produce the same power. i.e. after you put ported heads, a bigger cam, a less restrictive air intake, and headers on a car, but keep the stock throttle body, you would get the neck snaping takeoff or smoking of the tires that previously required 3/4 throttle might happen at 1/2 throttle.

Even if it only works at WOT, that's still worth something to me. But my (admittedly, not scientifically tested) experience tells me that all kinds of airflow increases from air intakes to headers, produce gains and WOT and part throttle, even when the stock throttle body is left in place, particularly if the stock throttle body is already pretty good sized for the horsepower level of the engine.