ummm no... i find that most hho folks throw out all kinds of theories about car engines that are just flat wrong, and it's mainly because they just don't know. they tend not to be car guys. so i'm going to go out on a limb and say you've never done any dyno tuning. it's quite easy to get the ecu to change all kinds of parameters throughout the entire rpm range. tuners do it all the time. hell in ford's new tivct motors you can change the valve train timing up to 60 degrees anywhere you choose in the rpm range with nothing more than a laptop.