I don't believe that Mr & Mrs fly-to-Florida-once-a-year-with-the-kids are going to fork out another £500 or so for the whole family to move up a cabin when they spend ages searching for the cheapest possible economy fare in the first pace. And even if they do, I don't think that CW or F will be in the equation anyway, so there's no real cause to panic. (Just in case anyone thinks otherwise, this post was intended to be tongue-in-cheek; I really don't care who travels in any cabin as long as they pay one way or another).