I wish people would just do away w/ the labels of American, English, etc.. In the show ring, there is an Am Bred class. In reality, most of the Labs could show in that class because they are indeed "American" bred (bred here).
I'm personally of German and Irish descent. My dogs have a spattering of several countries as well. Ughh, just look at the Lab, look at the pedigree (and yes, the breeder should post pedigrees...), look for titles proving their value for trainablity, conformation, whatever is important to you, and look for depth of health clearances. If any of this info isn't offered, red flag goes up...
I guess this is Post 1. LOL. Does that mean I'm a puppy again???
Anne