I think it's been there for a while BUT my understanding from the DDE people is that it's only good after 5 PM. (I think that at Epcot you can get your parking ticket paid if you arrive after 5 and have a receipt from dinner, but that may have changed)
Anyway, if you arrive at Epcot after 5 I don't think the DDE spots will do you much good. I can generally just drive up front and find a good parking space then.