4 Results for large systems Despite DFT's somewhat poor reputation for noncovalent interactions, the present work showcases that dispersion-inclusive and dispersion-corrected functionals achieve MAEs 0.5 kcal/mol as compared to CCSD(T)/CBS benchmarks, for total interaction energies in small noncovalent dimers. Errors are larger, yet equally consistent, when those dimers are ionic. Dispersion corrections are not genuine dispersion energies in themselves yet they correlate quite well with benchmark dispersion energies from SAPT calculations.