Correct (Boeing)technique :
Keep FAS : Vref + X ( for winds <= 10 knots : 5kts) until crossing the threshold, thereafter bleed off the speed during the flare
Boeing have always avoided recommending the point on final approach at which you deliberately commence to reduce airspeed when the only additive is Vref plus half the steady headwind component.
Example runway 27 and wind 270/30 knots. Half the HW comp is 15 knots therefore approach speed Vref plus 15 knots. Under steady wind conditions the average landing will bleed no more than 3-5 knots off in the flare providing you do not float. . That leaves at least 10 knots excess speed. The free flow airstream (wind gradient) commences around 2000 ft above ground level. Below that, ground friction slows the wind. This suggests in a perfect world you should commence the bleed off of the half the steady HW component at 2000 ft. It is this failure to understand the dynamics of bleeding off the half the steady HW component, that has been a factor in some fast landings and subsequent over-runs particularly on a wet or slippery performance limited runway. Everyone becomes an expert when this point is discussed.