i think the point of the show is to take "normal" women and show them that they are not as bad as they think. All the women on the show have hated their bodies, when the reality is there is nothing to hate. They have warped perceptions of themselves, as shown by the little tests (the line up and the computer simulation). What Gok Wan does is make the women comfortable in their own skin, so much so that by the end they are willing to show most of that skin off to the general public! If a larger or indeed smaller woman had such an inaccurate perception of themselves and wanted to be on the show then iI'm sure they woulod be welcomed with open arms. The idea isn't to make the women look thinner or anything, just as good as they can look with what they have.