The limit in the chart was less than 6 inches. I think the Taurus Millennium comes in right at 6". Bobo admits there are a lot of good guns just above that limit, but he had to cut it off somewhere and chose 6".
Here's a link to more good info on pocket pistols.
It's helpful, but I selfishly wish the chart included trigger pull information. I wanted a Micro Desert Eagle - Magnum Research ME380 till dry firing one. The pull was really long in relation to the competition and -subjectively- felt varied like a row boat stroke.