Agree there's no right or wrong but he did not qualify his opinion at all saying: "And if you look at the biggest duds in recent decades in terms of performance and style it's the american auto's."
There was no room for doubt there and he did not make it one of personal choice and that is what I responded to. You could have taken your response and applied it to his comment.
Even though I responded to your post, I was responding to the board in general, not just you.
He made a strongly stated opinion. But since he referred to style, which is always 100% subjective, it was clearly just his opinion. To my way of thinking, unless we're using "dud" to refer to an explosive device, it is probably being used as part of a statement of opinion. Even a cars automotive performance cannot really be factually a dud unless it couldn't make it to 60mph or around a turn or some other total failure like that (analogous to a bomb that fails to go off).
So, given his statement seemed entirely subjective, it didn't, IMO, require any qualification as such. Unless he was referring to financial performance as in (the car never became profitable so it was a dud). He would have to clarify if he meant automotive performance of financial performance.
Anyway, perhaps it would further the discussion to ask him to list those American cars, from recent decades, he thinks were duds. And you can listed those cars from outside the US that you think were bigger duds. That'd be a good debate.