This is the only video of the aileron movement I have seen off-hand:
The hinge type was of the piano variety, where (if I understand it correctly) the entire surface moves around a simple arc centered on the forward hinge pivot. +25°/-20° total movement up/down for the P-38. From the drawings I have seen the leading edge of the aileron is not shaped like an airfoil, rather more of a concave shape. No forward movement or lift/lower of the leading edge is present (that I can see), other than the slight protrusion of the upper/lower leading edges of the aileron when moved up/down through the simple arc.
Also, I could be wrong.