On first inspection that analysis seems sufficient but it falls apart when you take a slightly wider view.
There are 351 monks with 1600 or more XP and well over half are in the left-most 1400 XP of that approx. 27730 range.
Only 38.7 percent of monks that have reached level eight have gone on to sainthood but a whopping 73.9 percent of monks that have made it to level nine have become saints.
That's the phenomenon that I was attempting to explain with my "psychoanalysis." Of course, I have no idea of its accuracy. I've always had an insatiable need to speculate about why things happen though, and I don't think these observations are entirely due to the system's structure.
For what it's worth, I think there is a similar threshold at level six.
-sauoq "My two cents aren't worth a dime.";