While I hate the general mentality Stocking promotes, it's obvious that she isn't an idiot. It seems more like "HEY, SHE SUCKS BECAUSE SHE INSULTED ME!"
Also, if she's considered "fat," then you'd also see Mary Elizabeth Winstead as being "fat" in Scott Pilgrim (she put in the most weight for that, and looked excellent). To which I would reply that the individual is most likely homoloveual and only likes females based off of trendy bullstuff.