I dunno–butter brickle is a pretty common British flavor, isn’t it? Certainly toffee is, which has IMO a similar flavor.
I have a cookbook from England of ice cream recipes, and it had something that was basically breadcrumbs caramelized in butter and sugar and turned into ice cream. I’d think that butter pecan would be a perfectly acceptable flavor to Brits.
If I were thinking of quintessentially American flavors, I’d think of the following:
-banana pudding (not common, of course, but far and away the best ice cream I’ve had recently)
-Anything with peanuts or peanut butter
-Anything with chocolate-covered pretzels
-Pumpkin (which makes kickass ice cream)
Actually I’m American, but I don’t really eat much ice cream (due to taste aversion to milk)–I’ll eat it but very rarely. So I sort of know all these flavors by name but not by taste. And I just realized I have no idea what most of them are. I googled butter pecan and I sort of can tell what it is but I think one day I’ll have to go on an ice cream tour of America.