Mea culpa...
Rather than be revisionist with my last posting (i.e. going in a changing the paragraph involved), I will correct the remark about AA not honoring Cdn+ upgrades after June 25th by fessing up this way. I was a bit confused when writing that last post, thinking AA was fully withdrawing from Cdn+ in June, which is not the case of course. Until that does occur, stickers should be honored reciprocally. It is just lounge access which is being removed totally as codeshares go.
Good news about access to STAR lounge system. Does this mean CP will be using ANSETT or AIR NEW ZEALAND lounges at SYD international?