I'd mostly agree with this. I feel it can't be above 0.01%.
Quick back of envelope math: QF flies five flights a day with a true F out of Australia currently (SYD-DFW, SYD-LAX, MEL-LAX, MEL-DXB, SYD-DXB, ignoring SYD-HKG as not F service). These have 14 seats each. This is just over 25,000 F...