I thought that the carribean destinations were also "NA J" regardless of length (i.e. no ammenity kits, etc.). I know that you can get 763's with pods on certain routes from eastern Canada.
That being said, a few years ago I flew YEG-PUJ and found the J service to be less than what you would get on a typical NA J flight. In this case I didn't really mind that much since the flight was booked through ACV and the upgrade was only $300. I thought the service was a little too "laid back" which I could understand if the flight was only sold through ACV, however this flight was also sold on the main AC.com website, so I expected typical mainline NA J service.
Yes, at the time I knew the flight would be on a 767 (as opposed to the 763's now in service), so expected the 2x2x2, it wasn't the seats that disappointed me.