Yup, Nokia Faked the Still Photos In Its PureView Promo
Nokia has already confessed and apologized for faking the optical image stabilization sample footage in a new promo video for its Lumia 920 phone. In case you weren't sure: yes, the sample still photographs in the video were faked as well.
Designer Youssef Sarhan did some investigative work after the story initially broke, and came to the conclusion that the images were almost certainly taken with a camera other than the Lumia 920.