The long answer is that neither the twEECer nor Quarterhorse give the PCM that ability. You are programming the factory computer (which does have the ability to command a shift to begin at a certain RPM). The hardware you use is only your storage and interface medium with which to allow the PCM to execute your calibration changes.
It and the twEECer are competitors. The QH has a good many benefits over the twEECer but features aside, both are plugged into the PCM and are used to load modified calibrations to the PCM, completely overriding the factory programming.
It and the twEECer are competitors. The QH has a good many benefits over the twEECer but features aside, both are plugged into the PCM and are used to load modified calibrations to the PCM, completely overriding the factory programming.