In Oz, most of the PAPIs at the major airports have been set with an eye-height of around 60-70 ft, whereas the ILS has stayed at a Threshold crossing height of 50ft (or thereabouts). The reason I've heard bandied around is to make the PAPI look normal ie 2R/2W when the ILS is flown by a wide/long body (I assume brought about by the intro of the A380). This makes sense, as the eyes in the cockpit and the GS antenna would be more vertically-spaced than for a smaller aircraft.
We brief what we'll see on each approach ie a flyup indication on the PAPI down low (we are required to follow the GS to touchdown if it is available: also stops FOQA events).