it doesn't seem subtle to me
and how exactly is it that a bye the eye DR rating gives a higher score than an engineering rating which goes deeper in the noise floor than some eyes would like?
For the nth time...DxO is not measuring photographic DR. They are measuring sensel SNR, running those values through a 'black box' formula, and predicting DR.
Understand that direct observation always trumps theory and prediction. Always. Never the other way around. No matter how much math, effort, belief, or faith you put in a theory, nor how many so called 'experts' trust in the theory, direct observation always wins.
DxO measures sensel SNR and concludes that a 70D (for example) only has 11.6 stops DR. Someone photographs a step wedge and sees 13 stops between black and white. The question is not "how exactly is it that a bye the eye DR rating gives a higher score than an engineering rating"? No, the question is "where did the engineering testing, model, or rating fail?"