Originally Posted by ngadrien
I've just been searching through the AC forum and came across "comp u/gs"... I've never experienced CX doing this, has anyone? I'd love to find out logging onto my MPC account 2 days before departure that under my "status" coloum its been replaced by business over economy... saves the anxiety while travelling to the aiport check in (or even the gate for that matter

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Search, search and search. This has been discussed many many times. Try the word "upgrades or op-up". Op-up's are based on your MPC status, route, class of travel, and if the flight has been oversold. CX will not op-up you just for the heck of it.
And you'll NEVER find if you get op-up'd 2 days before flight. Chances are it will be on the day of departure ... and most likely at the gate just prior to boarding.