By land area Canada is about 20 times as large as California, by culture I'd consider Canada to have a few much more distinct areas than California (comparing Toronto vs. Vancouver vs. Calgary the distinctions are pretty close to the range you'd get across the whole of California by my opinion - with Quebec being radically different... Quebec is less like Vancouver than Texas or Mississippi is like California). By population there's only a really narrow difference between the two - so I really don't agree with that assessment.

Also, as a former Vermonter please don't you dare call me a New Hampshirite - but for a survey like this you can probably lump everything from Philly to Bangor into one chunk.