DOF isn't the issue. It's got most of the right side of the frame in focus (except for the closest chair) and most of the the blurry parts of the image are in a plane with sharp parts of the image.
My first inclination was mirror slap combined with a somewhat slow shutter speed, but that would cause the top or bottom half of the image to be blurry, not the left or right side (unless they're using a camera with a side-to-side shutter -- I don't know of any).
I notice that the aspect ratio changes from image to image. Perhaps this is a pano or composite of two images, and the left one was simply blurry? Do you have any idea what equipment they were using?
I agree with Dubb, this looks like movement, not OOF. And it couldn't be a sensor problem since all the other photos look sharp.