On another note, can we stop with "Q" codes? I certainly am not loyal to the friggin' queen. Altimeter will do just fine.
True. Perhaps you should write ICAO and have the terms taken out of their standard phraseology. You make these comments as though CX invented them rather than simply complying with international standards. Admittedly, navigational Q codes are becoming less common but those associated with altimetry are alive an well.
Having said that, when I fly in the US I use "altimeter" rather than QNH for pressure settings, statute miles rather than kilometres for visibility and feet rather than metres for RVR. Likewise, I fly metric levels and altitudes when in Chinese or Russian airspace, both countries using Q codes for altimetry. Perhaps after you've finished your letter to ICAO you should write to the Russian and Chinese authorities and tell them to "get with damn' program".
STP