First, the choice isn't between McDs or BK. The choice is between eating whatever you want, anytime of the year, versus having to eat from a rather restricted range of goods that are only affordable when in season locally. Second, you say it's very possible that few Chinese would consider the choices of food in the US superior, but there are studies, and if you press me on it I can find them for you, that have indicated otherwise. What those studies revealed is that as Asians become more and more wealthy, their diets tend to become Westernized to greater extents. Granted, they will retain some of their cultural preferences, but the quality of what they eat typically diminishes. The studies were examining diseases that are linked to Western diets. The aim was to find out if those diseases were genetic problems isolated to Westerners or if the diseases resulted from nutritional habits. What those studies quickly found out was that the Asians will not only adopt the Western diets as their means increase, but the diseases they are vulnerable to will follow the diet they consume, ruling out the genetic hypothesis.