My wing goes up sooner if I have the throttle floored, than if I was accelerating slowly. Makes a difference of upper 50's to lower 60's. Don't think it matters much exactly what mph it goes up at, I wouldn't think, so long as it does.
Something I noticed with my xf, is there is an extra "push" when I push the throttle all the way to the floor. It goes smoothly until the very last , oh I don't know, maybe 1/2", then it's almost like I have to push harder to get past that spot to get it to the floor. Has anyone else experienced that?
That's probably the point of FORGET GOOD GAS MILEAGE, LOL!