As an aside, and because we are talking about yeast, McDonald's burger buns are not really dough based risen bread. It's baked foam. Like they squirt it out all foamy and then bake it. (It's possible that no yeast is used, but I'm not sure)
Industrial white bread processes do tend to involve very high speed/power mixing that incorporates more air and leads to a smaller crumb structure than traditional bread, but it's certainly not squirted out as a foam.