I wouldn't say ethnic-group formation happens as soon as the next generation (after the founding generation), but I agree with the larger point. I wouldn't be s

I wouldn't say ethnic-group formation happens as soon as the next generation (after the founding generation), but I agree with the larger point. I wouldn't be surprised if in a couple hundred years no one would bat an eye at talk of "ethnically American" or "Norwegian of American descent". My understanding is that that's more or less what happened with the French.