While I love Julia Child dearly, and would never seek to diminish her influence on the topic of cooking in America, I think this is a bit overblown. The returning GI's had experienced European culture, including food, (and to a lesser degree Asian Culture). With the new medium of television, and other modern communications, and aided by the convenience of modern commercial air travel, there was hardly what one could have been called a prevailing attitude of "isolationism" concerning Europe in the post WWII United States. In fact, European arts, fashions, cars, and influences were considered quite chic, and superior to our own in celebrity and intellectual circles. Julia surely was the right person, in the right place, at the right time to introduce French cooking, and innovative culinary techniques in general to a new audience, and that by itself is enough to insure her place in History.