Unlike spin state ordering, structural parameters are often assumed to be relatively insensitive to functional. We found that this assumption held true in general for metalloporphyrins but note some quite substantial outliers. Most notably, as has already been studied for FeP, metal-oxygen bond lengths were found to vary directly and strongly with the amount of exact exchange in a functional for the dioxygen adducts of all but the most strongly binding MnP (Figure (a) and (c)).