It turns out that the most interesting weight loss at the Met this season wasn't Deborah Voigt's but Veronika Part's. Voigt seems to have sacrificed -- at least for the moment -- her vocal sheen and deep power reserve, but the tall Part, who went from 'normal looking' on the Kirov's '02 tour to her current 'ballet thin,' has been liberated.
Mind you, I don't actually know anything about ballet. But to these eyes Part's become both a more athletic, more technically capable dancer -- her Odile now revels in her physicality -- and a remarkably communicative one. (There was, if I recall, something reserved about her stage persona in the past; that's gone.) If she'll never catch Vishneva in the former aspects of the art, I doubt I'll ever see as expressive and moving a performance from that Mariinsky star as the ones Part's giving us already.
In 2002 everyone was talking about how interesting Part's swan was; today, I think, it's something else. -- Not that I expect Voigt to turn into Karita Mattila or anything.