While we just finished our 4th trip to the world, this was our first time using codes thanks to the education from these boards. From what I've seen, codes will apply to all the deluxes and as noted before, about 40% off rack rate where moderates may only be 15-20% off.
AKL and WL are on one price level and the cheapest of the deluxes. Believe VWL and OKW is at this level too. We were just at WL at 139 a night for Courtyard. As comparison, we were there last year at disney club discount and paid 148 a night for standard!
Next level seems to be BWI, YC/BC and Poly (i think). Believe BCV and BWV on this level. We were at BWI at 179 a night standard room. (loved BWI!)Only better rate I saw would have been AP rate and that was 169.
I think the next level is Grand Floridian.