It's true, at a first listen, you belive it's a score for a serious movie, which is the reason why it's so entertaining. Not a masterpiece, but it's fun and the short tracks make it a very light listen.
The movie, on the other hand, is idiotic. Never have we seen actual stupidity in film. There are stupid films, but they usually have some thought put into them. But Meet the Spartans is stupidity itself.