Ever thought guys, that maybe the COBT system is just a layer to try and ensure a set amount of aircraft “targeting” the same 20 minute window, and not to get you to the gate at an exact minute? How on earth do you think it’s going to work unless you’re airborne?
It was explained to me that the reason why you get max speed to the field sometimes is because the enroute controllers are merely working off a feeder time. Whereas the terminal controllers see the whole situation in close and can close up those gaps.