Yes, I've heard of this effect in marketing. If you make any reference to Switzerland, it's instant sales bump, even if you hold everything else equal. This is also how you got "Häagen-Dazs" ice cream brand. It's fully American, but the name sounds vaguely Scandinavian, so it has to be better, right? Well, customers sure do think so, and are willing to pay the premium.
Not challenging your marketing presumption; I've noticed, and seen pointed out, the same thing.
As a side note, years ago Häagen-Dazs was better (high milk-fat, etc) than the other widely-available brands. It's now owned by Nestlé, so I don't buy it anymore. How much has it been enshittified?
Ben and Jerry's enshittification makes me sad. Interestingly enough, I was told when I visited the Vermont (original, and now theme-park-ish) plant that they still use the original recipes there.
