SpoilerBut we're all missing something. If Judy is a Stupidworlder, why is she the same size as Jillian? Jillian was popped and raised in Faq, in Erfworld, and is thus the size of a child to a Stupidworlder.
Also, some Retconjuration's been going on; "Dorothy" in the last Book 0 page has been inexplicably changed to "Judy Gale".