Thanks for the link. It's a better showing of the work. I like the google image version still because it talks of the solid presentational and conceptual aspects of the work. I'm curious if artists ever curate their work with image search in mind.
I read on her site that she samples from an 11px x 11px square taken from each photo. I know that Photoshop has a function that averages pixel tones, so maybe she uses that.