Paging Neuro. Doctor Neuroanatomist, please post to this thread.
Overall, it looks like there is something to the 'perceived' resolution, and that the problem they are stating, that MTF charts are not what the vast majority of photographers read, seems fine. But I think they need to publish (if it wasn't in the article, I may have missed something) how they came up with the numbers. Give us the methodology, and then we (meaning not me, someone like neuro probably, or Roger at LensRentals.com) can run their own numbers and thoughts and see if DxOMark's number makes sense.