Experimental evidence versus exchange theory of resistivity saturation

In a recently published paper Laughlin proposes an exchange-interaction theory of resistivity saturation based on the Altshuler-Aronov depression of the density of states at the Fermi level. In my view this contradicts the many experimental data on disordered metals in which the density of states does not decrease relative to the ordered phase, yet resistivity saturation takes place. Exchange-correlation (and localization) effects become important in the regime in which $k_{F}L\sim 1$ and $\sigma \sim {\sigma }_{min}$. This is not the case in typical saturated metals, where $k_{F}L\sim 3-6$ and ${\sigma }_{\mathrm{sat}}\sim \mathrm{}(10-30)\mathrm{}{\sigma }_{min}$.