For some reason U.S. skaters, especially the ladies, have never taken Four Continents seriously. I don't think either Michelle or Sasha has ever gone. They would rather spend the time preparing for worlds.
In contrast, the European skaters -- for instance Irina Slutskaya and Evgeni Plushenko -- treat Europeans as a huge event. They are more proud of winning it than of winning a mere national Championship. Also, they seem to feel, unlike the Americans, that the best way to prepare for Worlds is to skate.
Mathman