While it was my understanding that buses would be routed to certain resort areas that geographically made sense, our experience suggests that "supply and demand" may be overiding that original plan.
We arrived last Wednesday afternoon and were put on a bus with a couple other families. One family was with us at POFQ, but the other was at the Polynesian Resort, not exactly next door neighbors to POFQ.. There were several other roped off lanes at the DME area of the airport and maybe about 50 other people awaiting their buses. By putting us on the bus with folks from Poly it occurred to me that they were simply using the "moving em in" and "movin em out" mentality when things weren't busy.
This being said, God only knows who'll be on the bus with you!