So is that transition or "low end power"? The difference between a prop and wheeled vehicle is how long it takes to reach high RPM. If the engine can't transition from part throttle to full throttle it will make poor power at the low RPM until the mixture improves to the point it can. I don't think carb issues are in question here. Fuel mixture issues are a separate problem from how much power an engine makes at a given RPM and what happens when that power becomes available. In a car when the engine is at low RPM and more power becomes available it takes time to reach high RPM. This is felt in the seat of your pants as acceleration. If the engine makes good "low end power" acceleration is quick. This is easily seen on a dyno plot as well. In an airplane, the RPM response to increased manifold pressure is virtually instantaneous, assuming fuel mixture is such that this can occur.