Thanks Mike and boothg-3 for your replies.

I am currently using a Spektrum DX-7, which does not have throttle curve when on airplane mode. I have to fly my planes on heli mode to be able to access that important feature and that leaves me only with one p-mix for use. Having said that, I am very happy with model match and more so with servo sync. I fly a 50cc extra and my 2 elevator halves move at the same speed, as if they were being actuated by a single servo. My question is, with the A9 having a latency of 52ms, if I am not mistaken, and no servo sync, would 2 elevator halves move together at the same time or one would move faster than the other?