It was kind of obvious, because she uses very thick, 3-D fabrics and techniques to create those ultra-lean silhouettes. The models are thin, but not THAT thin. That said, it's not all lies because she herself manages to wear her own clothes very well IRL. Still, not a good tactic at all to photoshop like that.
I like her work; it's always, to me so far, fresh, and she has lots of identifiable personality in her design. Much better than a lot of the other couture shows.