Fun fact: a lot of people think artificial grape flavoring doesn't taste like grapes. And that the "Welch's concord grape jam" variety of jams is artificially flavored.
Yeah, Concord grapes are based on Fox grapes; when the new Welch's headquarters opened on Baker Ave they included a plantation started from cuttings from the original farm (which is just a house now but they still maintain their own grapes.) Welch's downsized and moved the HQ to Waltham last year, apparently the vines got distributed to local historic places and farmers https://concordbridge.org/index.php/2026/04/06/the-grape-esc...
Nope, that's just what some grapes taste like. There's a Korean variety, and Concord at least. Wiki says it's this: https://en.wikipedia.org/wiki/Vitis_labrusca