Why choose a polysphere ? If you choose a poly cylinder and turn it on it's side the flattten it I would think that would be the most simple way to create a wing and you could keep the polycount down to a minimum and add a cut when needed to pull it into shape.
Dont forget you can select the polyshape and reduce the number of spans to the original primitive i.e. from 20 to 10 and when smoothed it will still be ok.
That is how I would do it but others might have other ideas