That's another thing Jack. It was probably several schools, Oxford Aviation Academy, ASU and Mesquite call signs (not sure of the school other than Texas but largely Asian students that fly out of the Phoenix area) along with other pilots holding for entry to the ILS for runway 5 above the Stanfield Vortac. (Hence the "stack" talk you heard) I've flown in there with the same chatter and the wind favored 28. I keyed up and asked, "are we on runway five or two eight today?" and two people answered, "they are doing approaches to five but we're using 28 because of the wind." Sure enough I crossed midfield 500' above pattern altitude following a Bonanza who was turning base for a full stop when I heard in a heavy Chinese accent, "Mesquite six free on a pive mile pinal lunway pive." I continued on and turned base and final announcing all the way and landed when I saw the guy on final for 5 off set his approach to the South. I went in for breakfast and after talking to several pilots there I found out that they always do that. So I don't got there very much anymore.