The main disadvantage of the ETC is that the pedal response time is significantly slower due to the manufacturer’s settings. The ETC determines how MUCH the throttle body will open and how FAST it will open. So when you press the gas pedal down fully, some manufacturers' throttle bodies will only open to 80% and all of them will open at a speed the computer thinks is best. This is how acceleration is controlled and limited in ETC vehicles. Our engineer says it doesn’t matter how quickly you floor the gas pedal; there will still be a lag in your throttle response.