Reality check, please! I have read here how DXO has set up their tests perfectly and free of external interference and such.
First of all there is no such thing as a perfect test. There is always a possibility for someone doing it better. Secondly I don't believe for one nanosecond that DXO is free of what has been described as Nikon fanboyism. Maybe this affects only one DXO employee determining test results, but that is where it counts, especially if DXO could not get rid of this employee over years. That whole thing smells rather fishy to me, like a fish that has slowly travelled from the Mediterranean sea to the vicinity of Paris, sitting there on a shelf for a while.
If Nikon's market performance would mirror DXO's test results, perhaps there would be something there, but this is obviously not the case. So why are people's buying decisions so different from DXO's test results? Why would photographers owning both Nikon and Canon gear still use Canon gear?
In my humble opinion Nikon's and Canon's products are comparable to some extend and market performance by both companies does support this view, even giving Canon a generous advantage, but according to DXO it appears like no one should buy Canon's products. That doesn't fit reality, so DXO's test results must be way off. It does not help that they try to cover up, by making this appear to be impartial and proper, when it appears to be not.