I will add this. I was looking at the instruction manual for a GP Dazzler 40 yesterday. In the final trim section, they discussed the affect that ailerons have on lift. The manual discusses trim settings for aileron throw.
Aileron Rigging: With wings level, pull to a vertical climb and neutralize the controls. If the climb continues along the same path, the trim is correct. If the nose tends to go to an inside loop, raise both ailerons very slightly. If the nose tends to go to an outside loop, lower both ailerons very slightly.
So, to answer the original question, do the ailerons provide lift in the neutral state, well, yes the ailerons do indeed provide overall lift because they are part of the wing. When the plane is flying straight and level, the wing provides the necessary lift at a particular airspeed to fly straight and level. So, being part of the wing, yes, they do provide lift.
CGr.