Wye vs. Delta

I was talking about timing. My post says that a wye works better in one direction then the other(a result of 'timing'). (the only advantage of delta is that it works equally well in both directions)
So.... will reversing direction (by changing 2 wires) also reverse the timing, and how do you tell which is the good direction and which is the bad direction. And further, if your ESC wont let you reverse your throttle setting how (or can you) reverse the timing if its set for the wrong direction?
Anybody getting any of this???