Lifelong American Midwesterner and I'm also convinced there's a big difference in the taste of some produce between what you get at a typical American grocery store and a farmer's market or my local natural foods store. I get all my produce there, and people who don't normally shop there often comment on how much better my raw vegetables are when they eat at my house.

Someday I should go buy some produce from each store at peak season and try them side by side.