Hi Suin,
Till 2005 I travelled with 32 Kg x 2 pc = 64 kg (per passenger allowance) to Canada. Later, my wife and me had a trip again by Lufthansa in April 2006 to Toronto without knowing the fact that there is a change of baggage rules. We had 4 suitcases of 128 kg and was asked to pay excess baggage at the airport. Rest you just imagine!!!...
I hope the baggage rules may still remain unchanged (not for ever...) for CANADA/USA sector, but they are striving hard in any method to make up their expences. You can see the reduction of quality in the inflight services. The standard of food, beverages/drinks served in the flight has dropped.