Overall, the percentage of MOFs that failed to yield 95% purity upon inclusion of their microscopic diffusivity increases with crystallite diameter, from 7%, to 8%, to 13%, for R µ = 1, 10 and 100 µm, respectively. If we consider only the region of interest, the percentages are 6%, 7% and 11%, respectively. In addition, we observe a fraction of MOFs that experience a smaller, however, still significant performance drop. They represent 5%, 5%, and 7% of the distributions initially populating the region of interest for R µ = 1, 10 and 100 µm, respectively. Combining both types of performance drops, the percentage of "false positive" MOF candidates that can be sorted out based on molecular diffusion amounts to 11%, 13%, and 18% of those initially located in the high-performance regime.