What hope do we simpletons have when manufacturers depart from 'standard'?
I might be wrong about this, but I suspect it all started with the FAA's previously preferred use of the expression "DH" when everyone else was using "DA" for Cat 1 ILS. Methinks that manufacturers were simply following the path of least resistance for the sake of achieving FAA certification of their aircraft and/or components. I for one am happy to see that there is now, apparently, a will within the FAA to bring this terminology into line with ICAO. I foresee a scramble by manufacturers, to catch up with this.