I dont know if my point is valid or not but to me the 24-105mmL lens used for the review is way sub standard compared to 24-70mmL. I have had used this and sold it out. It would be great if the test of both camera use the same type of lens (24-70mm f2.8L) or nikon 24-70mm on both cam (adapter on Canon cam of course).
I dont expect Canon will do better in sharpness than Nikon, all these while I noted the canon images slight softer but responded well in PP for sharpness. This at least a better head to head comparison...IMHO