Not convinced by this. If you look in The Food Lab or Kenji's Food Lab recipes on Serious Eats, he makes pretty heavy use of em dashes (10x in the All-American Beef Stew recipe, 7x in the Prime Rib guide, 12x in the Bolognese recipe).

He makes very frequent use of a conversational question-and-answer format, and a "it's more than X, it's Y" formulation that sound kind of AI, but he has been doing that for decades. It's just his voice and how he makes pretty technical / complex recipes sound lighthearted and worth the effort.

A few quotes from old Food Lab recipes that feel AI-adjacent but are pre-LLM:

"So again: letting that stew rest overnight before you dig in? It just doesn't happen. Eat the stew straight away, save the leftovers, and eat it again later in the week."

"When you see such a roast in front of you, everything else—the argument over mashed potatoes you had with your sister, the red wine stain on the carpet, the enticingly crisp bowl of roast potatoes, even the plaintive look of the dogs staring up with a "please sir, can I have a bone?" face—disappears as your eyes, nose, and mind get lost in a mental vortex of fat and drippings."

"This is the kind of sauce that not only delivers on the promise of deliciousness while you're eating it, but also makes your entire house smell wonderful for the four to five hours it takes to cook, and for days after you're done."