Use the reverse thrust as long as requires, simple.
But looking at part of your question, you ask:
Originally Posted by
Centaurus
Would it therefore be true to say that reverse thrust should be positioned to idle at 60 knots ground speed if landing into wind, rather than 60 knots airspeed?
Very old question and the answer should be
YES, but alas most airlines only refers to airspeed in FCOM on many types.
It has been a long standing argument in many operations, as the philosophy seems simple:
* use airspeed when wanting to get airborne as we need lift and this is generated by air over wings which is measured by IAS on instruments;
* use groundspeed when wanting to stop on the ground as we need to come to a safe taxi speed which is based on GS on instruments;
If only management would read this thread...