Chris usually takes an educational angle, I don't think this is LLM-generated content at all it's just his style. I highly encourage watching some of his DefCon or BlackHat talks, they're fun!
I looked at both links and don't see anything weird or annoying, and I hate overblown styles myself.
‘The counters tell the story’ might be something they consider odd. But I’m not familiar with the author’s style so they could have had these tics pre-LLM or they picked up these tics from reading a lot of LLM content.
Yes, that's the point where I was like "wait a second" and started counting em dashes. A third alternative, perhaps the LLMs were trained hard on his prior work? :-)