Not true, when I worked as a Station Attendant for AC, we put the Priority luggage "loose" in the rearward hold on wide bodies . It was not containerized. Generally, an effort was made to get the priority bags out first , but usually it was just one or two guys working on those. On a 767 that can take 10+ minutes. Sometimes, the cans happened to finish first ( atleast one or two) and they were sent in. It would be silly to hold everyone else's luggage until the ELITE members got theirs. Other times, minimal effort was made. However, whenever we sent bags out, they were always had special loading. It really is up to the station attendants on the receiving end.