Definitely differentiate between WP PG and WP (no PG). As to above that I'm not sure.
My few QF flights since attaining LTG (and with many thousands of SCs this year) haven't been anything special - other than the usual good service by certain check in/lounge/FAs who know me.
I guess I'll see when I next fly QF in Australia in a few days time if treatment is different or not.