What I noticed looking at all the pictures is that the plus sized models clothes look like they were made for them and the smaller models look like they are wearing something off the hanger. I've always loved the episode of PR, leading up to the finale, where they pick their models and make last minute alterations. It almost makes me wonder if the plus sized outfits were tailored to these models bodies from inception, but the smaller models' looks were designed more generically and then assigned.
I know many years ago when there was much talk about the heroin chic, painfully thin models it was often said by designers that clothes hang on thinner models better, and they were likened to walking coat hangers, which I always found an appalling way to describe a human being.