Felt this one was noteworthy
Maybe this is why people say psa is “harsher” now.
As they expand, they need lots more new folks to grade the millions of cards. If new graders tend to be harsher, you naturally end up with lots of conservatively graded cards.
Contrast this with more lax graders and you get the mismatch.
I also am assuming that by “conservative”, they are referring to grading cards harsher, meaning they get lower grades than a more lax grader.