After reading this thread and my last post (I was in the Adelaide lounge at the time), I again approached the service desk on the way out and specifically asked the question. I was told "Business and Platinum only, it's always been like that". I explained that it had changed in December last year. This was denied. I explained I'd just been sitting in the lounge checking the Qantas website and that there was a twenty page discussion on FF. It was suggested I was confusing Priority Check in with Priority Boarding, I pushed the point until I reached the "Sorry Sir, those are the rules" stage and gave up.
I was flying business anyway so didn't care but really! I only wanted them to check but they knew the rules and I didn't. Pity, they're usually quite nice to me in Adelaide.