[nickpsecurity]

I agree with you on how their quality is spread out. But, this...

"School-type long essays only seem to exist in academia."

Does an AI know what an essay is? Would it consider any long, descriptive post an essay? Especially if pretraining data has many people describing long posts as essays or "essay-like?" Or only actual essays? And what is an actual essay again?

I think AI's might have different interpretations due to the above questions. They might also conflate essays with longer, detailed, or argumentative posts. We'd have to put a bunch of posts into a bunch of AI's to ask how they classify them.