QF priority boarding in Cairns this week worked perfectly. From memory, it always has. Despite there being a long queue, nobody seemed to jump into the PB lane.
Kudos to the passengers. The lanes were clearly signed as well.
You sure you're not talking about VA here?
That being said it was a shambles when it first started in CNS. Roping, signage and what not was a mess. That reminds me my last QF departure from CNS was a joke as well, had the ropes up but the signage was off and no announcement.
It would also seem that pax out of CNS aren't usually the status holding kind so the premium boarding line is usually empty anyway that or a lot of them stay in the lounge till the last minute or as long as possible. The FAs man the non-premium side of the desk and so everyone just lines up in the one line leaving the premium side empty.