And then, after floating several possible reasons, answers:

America's fickle eating habits are actually a function of everything that America has gotten right, or at least, a result of things that make America so uniquely American: science, progress, open-mindedness, abundance and an emphasis on commerce and entrepreneurship. The "frontier mentality" that allows people to quickly adopt new foods also represents liberalism, flexibility and a willingness to experiment.

[via Food News Journal]