They were pretty good in the pass when you introduced yourself, it happened to me numerous times across the pond or form South America to Europe but never to Canada. It' have been years that I did not flown AF on long hauls, I do not know. You can always check on GPnet and see the loads upfront, you will be able to have an idea. I think nowadays that it is harder and harder to be upfront with all the revenue pax upgrading. Good luck..