Neat experiment. The 1/2000s images are certainly better in terms of subject clarity. I am not familiar with the earlier thread on this topic.
One thought: Wouldn't 1:1 crops be too harsh of a test for images that will be printed at up to 16x24 inches? 4928 D7000 pixels printed across 24 inches is 200 pixels per printed inch. Your images in this Nikonians post are coming up on my Dell monitor at about 4 x 5 inches in real world size. (They'd be even larger on other monitors as I have a high pixel density monitor). Isn't that a much higher magnification as compared with viewing a 16x24 inch print? And one doesn't usually stand close to a 16x24 inch print to view it.