The Drive Booster Module will improve the response time of the throttle pedal and you'll get an immediate response from the engine. In other words, Drive Booster Module eliminates throttle lag, but the torque output of your vehicle will not change.
Without Drive Booster Module and by constantly driving at full throttle the ECU will receive more high speed signals and adapt the engine performance to suite the style of driving that will make the engine performance more dynamic. But it is impossible and also bad for your engine to maintain that kind of driving regime so ECU eventually returns its state to standard. This is where Drive Booster Module kicks in - you simply plug it and your vehicle becomes more responsive and dynamic.