Have to disagree. Yes, Blue is available most everywhere and is a mass-produced fairly inoffensive beer that is best served cold, but I’d say that Molson Canadian would have to be the Bud of Canada.
Why? Canadian is available everywhere. I’ve been coast to coast in Canada, and the only bars I’ve found that don’t have Canadian on tap are those that consider themselves too upscale to serve common swill. (And even in one or two of those, it’s been the only non-micro or import available.) It’s available in every beer and liquor store I’ve been in, in both bottles and cans, in all package sizes. All in all, it’s a pretty safe bet that if you walk into a bar or liquor/beer store, they’ll have Molson Canadian.
The widespread availability is there; what about taste? Not much of one really. It has been brewed and is a lager beer, but it doesn’t hold a candle to European or North American micro lagers. It’s great on a hot day after you’ve been working outside and just want a cold beer or two, and don’t care much about taste. Blue, I find, has at least a little flavour.
As for popularity, when I’ve worked blue-collar jobs, most of the times I’ve gone for a beer with the gang after work, Canadian was been the beer of choice for most of the beer drinkers. (Not mine though.) And when I worked in a beer store, Canadian sold like crazy to everybody. If they didn’t know what they wanted when they came in, they usually walked out with a case of Canadian.
Labatt Blue? No, the Bud of Canada has got to be Molson Canadian.