When do controls return to neutral?

Mxsmanic wrote:
Robert M. Gary writes:

On the ground the ailerons tend to flop around whereever you turn them.
They also flop in the wind a lot (which is why you tie them down). Once
you start rolling and air goes over them they (in modern, non-aerobatic
planes) tend to return to center, like a car's wheel.

And does this happen before you actually have enough control authority
to use the ailerons, or roughly at the same time that you have that
authority? I'm wondering if the airspeed sufficient to "neutralize"
the surfaces is lower than the airspeed necessary to make them useful
for controlling the aircraft.

I don't know, I never tried to let go of the ailerons during take off.
I'm sure it happens pretty quick though.
-Robert