It's just over 28 minutes.
I particularly found it interesting when she talks about how men's attitudes to her characters have changed, where they can see through Miranda Priestly's eyes. (approx. 24 mins. in.)
Also? I'll have to search to see if there's a youtube copy of her Vassar speech (27 yrs. ago) or a transcript someplace.
cross-posted at the dvlwears_prada community.