Those beers may all hover around the same quality, but I don't think a blind taste test could work at all with those beers (one way or the other.) They are all

Those beers may all hover around the same quality, but I don't think a blind taste test could work at all with those beers (one way or the other.) They are all rather distinct in their refreshing mediocrity (Coors is significantly more mild than PBR (hard to say if that is in a good way, or a bad way), and Rolling Rock has a distinct "corn" flavour.) Anyone who drinks a lot of those beers is going to be able to pick out which is which, at which point the taste test would no longer be blind.