On the flight home from the last JQ35 run, there was no priority boarding announcement made. When they called rows "x-y", I'm pretty sure it was the back of the plane, either way my row definitely wasn't included, I just walked up and handed over my boarding pass. The gate agent did a double take when she saw the row number, but then smiled and welcomed me onboard "Mr W". I'm guessing she saw the platinum status on the boarding pass, but who knows.
Or the staff was just too chicken/lazy/embarrassed to actually police the queue. We can have as many announcements, signposts, queue ropes as we want, if the staff isn't going to police and actually implement the policy, it all amounts to nothing. (This, I see, is the actual problem...)