Sure it does. We have two VQ P-40 wings, one with washout and one without. The wing that doesn't have washout would drop a tip everytime at low speed whereas the wing that does never dropped a wingtip. However, when full flaps were used, then the wing without washout had much less tendency to drop a wingtip. All Top Flite kits call for wing washout. even the ones with Selig airfoil. On the other hand, aerobatic planes do not need washout because you want the wing to snap easily.