I mean the ability to fake all these metrics is relatively trivial, since I have written anti-bot fingerprinting scripts for automating various online services that want to keep you from automating them, you have the text you want to send from source A, you have random typing speed array you want to type them in, your chance of mistakes (put wrong character, backspace to remove, put in correct character).
And this doesn't even have to deal with all the stuff about mouse movements that you don't register?
Of course maybe I am just being typical programmer here, I guess lots of the people use generative AI would be defeated by copying pasting in the text and getting labeled AI, but that would also incorrectly label lots of people who have old texts in handwritten form they do not want to type all over again (of which I am one), and finally I assume that there is money in the field so producing something that allows bots to display "human heuristics" would probably get made and be profitable.
Funnily enough when I was automating things, generally twitter, I discovered that my real usage often got registered as bot, so I figured what's the use.
Also talking with someone who actually worked on bot-recognition by usage metrics said I was overly paranoid on some of the things I made my scripts do to appear human.
on the other hand - my automation was based on not wanting to spam services but provide the minimum level of content posting and regularity to benefit from algorithms that boost content based on the poster's engagement level, automation that wants to spam cannot benefit from this because slowing things down to show as if it was made in real time by a human (with fully non-headless browser etc.) does somewhat defeat the ability to spam like a machine.