/\ I think that's slightly unfair, it's very true that she doesn't fit in the mold of the teenage younger looking models but to look at her in the backstage close ups, especially skin-wise, I can't see how you'd say she looked almost 30. Even some of the recent ones where she's been over made up.
The commerical work, the catalogues and bloomingdales adverts, do age her a lot, but again I wouldn't say even in those instances that 29 was a fair guess. 23 is older than a lot of models, even to say she looked older than most models would be to put her at about her actual age.
EDIT: sorry just read that back and it seems slightly rant-y, I just think 29 is a bit of an off guess.