Having noted these caveats, it appears reasonable to rank the dc-XC functionals in terms of their agreement with the DLPNO-CCSD(T) results. Several of these functionals deliver much more negative adsorption energies than the coupled cluster calculations, agreeing with the previously established trend that dispersion-corrected DFT approaches tend to overestimate the interaction strength in adsorption complexes. On this basis, BLYP-D3, BP86-D3, vdW-DF-C09, optPBE-vdW, and optB88-vdW can certainly be discarded. While the relative deviations found for vdW-DF and vdW-DF-cx are smaller, they are large enough to rule them out as well.