More than a mere few US retailers assume that expanding into Canada, because of its relatively small population (the population of California alone, at about 38 million, is larger than Canada's roughly 35 million), is akin to expanding into just another state. Making this assumption -- blindsided by the admittedly vast similarities across all walks of life -- is downright dangerous.
Do you really want to know why a barista not remembering their name offends people? Because people think they are special. Everyone thinks that his or her drink order is special and that his or her name is special. Everyone is too busy being offended about how they are special to realize that to an hourly employee trying to get by, you're just another non-fat, extra hot, no foam double latte.