Our eyes are now trained to see anything that is not string-bean as automatically "heavy" or "fat". You know the saying "don't make the perfect the enemy of the good"? Well I think in this case, Mr. Gottlieb has made "any-other-body-type the enemy of the -Sylvie-Guillem-body-type". I have no problem saying that Ms Mearns doesn't look exactly like every other woman on stage. But that doesn't mean she's automatically heavy.
No it doesn't. But to be fair to Gottlieb, he didn't say it did, or mention her body type at all. He only said that "at the moment, she’s just too heavy," and he said it while paying her a compliment.