As anyone who has flown the 757 at FedEx will attest, when we first got the airplane, we were trying to figure out how to slow it down on approach. Plus, we are all nice guys, so we try to do what approach wants. Got asked to do 170 to the marker one night to accomodate an MD following us. Of course we will. No problem. Didn't really pick up on the 15 knot tailwind until about 1500 feet. Gear, boards, flaps 30, open the window and stick my arm out; anything to get stable at 500 feet. Boards stowed, gear down, flaps 30, checklist complete and still slowing to approach speed at 500 feet; Captain says "unstable, airspeed, continue." Everything was in place by 350 feet, normal landing and roll out. Yes, we can still use some judgement (at least we could then).