Ive been around my fair share of hondas i have NEVER seen a wrong resistor box cause a car to not hit vtec, and run virtually NORMAL with no signs of any issues.
Usually when you have low impedance and no resistor box the car wont even run , if you have high impedance AND a resistor box the car will run but youll burn the injectors up, possibly the ECU.
I dont see a car with low impedance injectors and no resistor box running at all let alone that good as it did that day. I was there.
but hey, again i dont know everything.