That savings percentage is based on the current rates. The opening day prices have been lower than any *GT rates that have been released. Combine the 10% discount to the opening day release from a dummy date that was moved, and it goes even lower. There were a couple DVC offers that were below the opening day release rate.
but since i'm not dvc and have never cruised before (no 10% discount--i think that's where that discount comes from-not sure), and opening day for this cruise (may 20, 2013) is long gone, my best shot at a discount for this sail date is *gt. is that right?