tbh I always thought of Nancy as buxom, and in that dept Jodie would fit the bill. ALW said he was looking for young talent, so although Jodie is hardly ancient, compared to 17 and 18 year olds she could be be considered mature, in which case her age could rule her out; but her weight should never be called into account - she's a big girl, but certainly not obese.
She's not my favourite - but she does have some of the attributes required for the WE. I won't pretend I would splash out 50 quid to watch her, but given the choice between a buxom 28 year old who can hold a tune and a slender teenager who can't - no contest!
(I'm not referring to any of the finalists here - I know some think Sam can't hold a tune but as well as supporting Jessie I'm also a Sam fan).