Manufacturer warranty almost never applies b/c Costco is not an authorized distributor. As far as the return policy is concerned, AFAIK, the 90 day policy is only in effect in the US and has not been adopted by Canada yet. Maybe that's where they're getting their info from.
Unless you actually see a sign posted up with the policy change, you can probably safely assume the old policy is in effect. I was just at Beacon Hill Costco and there were no signs up. But, having said that, I would prefer the new policy as although they reduce the time for returns, they double the original manufacturers warranty (so at least 2 years for TVs).
You have a couple of photos that are great... you must be very good at photoshop!