"The recommended method for approach speed correction is to add one half of the reported steady headwind component
Not forgetting of course, the additional note in the FCTM which is to bleed off the half the steady HW component approaching touch down. It does not define the term "approaching touch down" This could mean after the flare or could also mean passing the outer marker, or passing 500 feet. Interpret as you wish.
Observations in the simulator reveal that 90% of pilots make no attempt to deliberately bleed off this specific 1/2 HW component because they assume it means during the flare. This inevitably means excess float unless the pilot spikes the aircraft on to the runway during the float. A potentially dangerous practice.