I'd like to clarify that I never "accused" American supermarkets of having less variety. In fact, my comment was aimed at expressing surprise at hearing such an accusation for the first time. Furthermore, I honestly don't necessarily find the 2-4 times brand diversity in American supermarkets to be particularly diverse, especially when comparing it to, for example, German supermarkets. Additionally, the size of a market does not imply "more brands" but usually means more space for the same brands, which doesn't necessarily equate to a greater variety.

But I honestly think U.S.S.upermarkets are great!