Vref - here are some numbers
With a MLW of 213.8T, the MD11 VREF is 163KIAS. VAPP is nominally VREF +5 = 168KIAS. With a gust factor of 20kt or additives to VREF of up to 20kt, VAPP can get as high as 183KIAS.
I seem to recall that FEDEX has a higher certified MLW than 213.8T; in this case, then at MLW, a VAPP could be in excess of 183KIAS.
Certainly makes for a quick approach from the final fix - it also catches the ATCO's off-guard. 5nm in trail on final is quickly gobbled up by a heavy (and hot) mad dog.