Role-playing Games Stack Exchange just satisfied the hidden qualifier to award the Generalist badge (a minimum of 200 questions in the top 40 tags), and a few dozen people earned the badge at once. That's all as expected (once you know about the hidden criterium).
What's odd though is that some sleuthing to figure out which question helped RPG.se cross that threshold revealed that the badge script seems to have waited until there were 201 questions in all of the top 40 tags.
Is there an off-by-one error in the script that grants the Generalist badge? (Or, alternatively, is it status-bydesign and there is an off-by-one error in the human-readable description?)
I guess it's unusual enough to track down the exact moment a site qualifies that it could have been overlooked for a long time.