there was a thread awhile back that said prime rib had been replaced with roast sirloin at all the buffets. Supposed to be a less fatty cut (and therefore more healthy) as well as a cut that is easier to control the cooking on. I think someone even posted a copy of a press release from Disney about the new "healthier" offering. On the official Disney website, I was looking at the Cinderella's Royal Table dinner menu & looks like prime rib is no longer offered there...which is a bummer, because we enjoyed it last May.
Had prime rib at Kona Cafe last September...was quite good.
If you like steaks, we had good ones at Kona, The Wave, The Grand Floridian Cafe, and Le Cellier.