I’ve measured the MSFS controller delay on multiple devices now, it’s there.
(yoke, stick, x-box controller) , while almost instant in X Plane 11 & W10 calibration window.
Small, but it’s definitely there, painfully obvious when watching it in slow motion.
A yoke/stick/controller axis input is usually just a potentiometer output read directly into the sim, but it seems MSFS might have a signal-filter, smoothing out quick changes causing a slight delay.
For me, this definitely changes the responsivity and “feel” of the aircraft, and can sometimes cause an oscillating “rubber-band effect” (especially during landing flare), since yoke input/corrections arrive a bit too late to the control surfaces too late for the desired input.
I just tried this by writing a small C# program that sends aileron/elevator position values directly to the sim using simconnect. From full deflection to opposite direction 16384 / -16384 in less than a millisecond(instant), but there is still that same lag/delay showing up in the sim.
The yoke/control-surface animation start moving instantly but slows down in the center position, to accelerate again towards the end position.
This is an issue of how MSFS handle controller inputs causing delay/lag, not the controllers themselves.