I called a week and a half ago to make a PS at the DTD RFC, and was told by the CM that you can't make them through the regular number. That CM gave me the number at Rainforest Cafe and I was able to get lunch for DS and me for any time I wanted. The woman I spoke with at RFC said it WAS a reservation, so that I should be sure to be there on time.
I'll report back as to what the wait was when I return! I hope the range on those beeper things is big enough to let me go shopping...