It is normally difficult for me to compare US vs Can. fares, but thanks to the examples in the thread "Price Hikes" I have determined that the Canadian fares are 35% above the US fares. The Canadian $ has recovered somewhat lately. Banks are charging customers 25% for the US $. Canadians may wish to book in US $ to save, although who knows what the official exchange rate will be by time of final payment.
I've noticed Cunard is slow to react to the fluctuation in the US and CA. currency and this has worked in my favour three times. So it was bound to eventually work against us.