Just a question--it's probably answered in the article, but I didn't see it. In Figure 4, the article shows a comparison of tight crops from the 1Ds and 1Ds3, taken at 45mm and f/6.3 and f/7.1. Now, those cameras have the same sensor size, and those images are taken at the same focal length, so my initial assumption as to what I was looking at in that picture must have been wrong--that is, I had assumed that the two pictures were quote-one-hundred-percent-pixel-crops-unquote. Had that been true, the 1Ds3 image would have been larger in screen dimensions to show the same area of the scene.
So, there are at least four possible explanations I've come up with so far, but to entirely make sense of the resolution results it's important to know which is the case.
First, it's possible that that the 1Ds image is "100% pixels" and the other is downsampled.
Second, it's possible that the 1Ds3 image is "100% pixels" and the 1Ds is upsampled.
Third, it's possible that both images are resampled.
Fourth, it's possible that those images are both photographs of the print.
In any of these cases, I'd be curious what Figure 4 actually represents, and, by extension, what's happening in any of the other figures (it appears that a comparison of Figure 2 with Figure 3 leads to the same questions, as an example.)