The thing about America is that it is fucking huge.
When they brought over the Office, they had to change quite a bit about it before it would be palatable?not to An American Audience, but to an incredibly massive and varied one. Lowest Common Denominator doesn't mean that we're a pack of idiots, it means that we're a nation that's so loosely connected, there's very little that we can all legitimately enjoy.
Design by Committee happens so often here because we usually Enjoy by Committee, too.
That's changing, it should be noted. Inception, Mad Men, Even Kanye West. The vision of a single auteur seen through from beginning to end is coming out more quality, and getting the critical recognition and commercial success we hope for it.
As for why we hate the French, it's partly that we're jealous of their cheap wine and delicious bread, and partly because they take every chance they can to just up and quit working, and that looks too much like laziness to be ignored.