ORIGINAL: CGRetired
Brett: Thin means a lower coefficient of lift because of the shape of the wing. The airfoil is smaller in diameter (for lack of a better description) so it has less lift, so it must be flown faster.. and it will fly faster because it has somewhat less drag. It all ''factors in'' when considering how the plane will fly.
That's just my view on it, I could be wrong.
My thought would be that it wouldn't have a lower coefficient of lift, but only lower coefficient of drag. I would really like to know if the thickness has anything to do with lift.