I don't understand how the test you're proposing would help you understand what the camera is doing. The image you posted demonstrates that your camera and lens combination can produce very sharp images, so I wouldn't think it necessary to try to compare what others do with their equipment under similar shooting conditions. Your gear appears to be quite good, why do you care what others do?
I think it might be more valuable for you to shoot the same subject, under the same conditions, while varying the settings on your camera to understand what you, your camera, and your lens are doing together. You seem to enjoy doing close-up photography, where understanding Depth of Field considerations is critical. A good DOF table or program would help manage your expectations and assist you in planning the shoot. http://www.dofmaster.com/dofjs.html
I'm making these suggestions because there is no obvious softness problem with your camera/lens combination. The image you posted would not all be in sharp focus because of the camera settings you chose. If you expected that, and the wrong part of the image was in focus, that is a separate path of inquiry that could lead to equipment adjustments. If you expected it all to be in sharp focus, then you should seek to bolster your understanding of how sensor size, aperture selection, focal length, and distance to target influence the depth of field; what parts of the image will appear to be in sharp focus.