I would think that what he finds disturbing is the fact that DXO rate the D800 sensor much higher than the 5D, but then say;
" 'half a mo, when we put a lens on it we're not so sure".......
Show me where their sensor measurements include sharpness as a tested parameter. Show me where the above article incorporates the measures they do use for sensors (DR, color depth, ISO noise) in the P-Mpix measurement used for the plot?
It's like they reported data on two people, one being 180 cm tall and the other being 160 cm tall, and you find it disturbing when they later report that the 160 cm person weighs 90 kg while the 180 cm person weighs 75 kg. You assumed the taller person would weigh more, and you're 'disturbed' when the data don't fit your assumptions. The problem is your false assumptions, not the reported data.
So what do they mean when they write this, with their Sensor Scores graph below?
Even the DxOMark mean and median scores can be explained by the small difference (-1/3 stop) in the Low Light ISO score between the cameras.
A small (1/3 stop) difference in the Low Light ISO score between the cameras accounts for lower median and mean DxO Mark camera / lens scores. [DXOMark]
Is DXOMark confusing the issue, or are they just confusing me!