People are going to argue black and blue that I'm wrong for doing this, but I'm not going to buy a new DSLR from Canon (or Sony!) - regardless of how good the sample images are - until it's been tested and evaluated by DxO.
Because scores aside, their methodology is fixed and the same for every model.
Thus I can look at their sensor measurements for noise and DR and get an independent view on where Canon are at with their new cameras relative to other cameras.
And to not put a finer point on it, I don't trust Canon to deliver significant IQ improvement just because it is a new FF sensor on a new camera.
This makes perfect sense if the criteria you seek in a camera is exactly the criteria DxO measures and you assign exactly the same relative weight to that criteria that DxO does.
This is true with any test. Tests can objectively measure specific criteria, but the determination of which criteria to measure and how to assign meaning to that measure varies wildly, always requires subjective judgement and does not necessarily reflect an individual's needs.
That you have found a testing lab that measures exactly what you consider to be the most important factors is great for you. Many others don't feel that way. Rather, many feel that the criteria DxO uses to select what measurements it takes do not reflect their needs, desires or even experience.