'Tis indeed a shame that Americans are seen as so Materialistic, not because of the sickening nature of our Consumerism and One-upsmanship, but because we have now lost sight of the original meaning of Materialistic.
It once meant (and still in Philosophy means) that if one is Materialistic, one assumes that the matter of the universe is all there is to the universe.
In this sense, many Americans are not Materialistic because they believe in some para-natural God/Satan duality neither of which exist in the Material realm.