It still seems like Shock and Poison are the most common strata, and not just by a little bit: red and yellow minerals specifically are lower across the board on like every one.
Is it just because red and yellow are less often bigger than the others, so people don't pick them up? : /
I'm pretty sure it's because minerals in the recipe for creating a statum don't appear as often within the stratum itself. Therefore, blue and purple are the most common minerals in a jelly strata, and lots of people run JK for money, sooo....
...or maybe people are just idiots. That's always possible.