It's entirely reasonable to ask for the underlying research in response to a blog post hyping up an unproven claim in an area notoriously full of amateurs making the same claim that historically fail to stand up to scrutiny.

Particularly when the only source is a friend of the author, posting on a blog named "AI Clambake" about "A weekly, human-powered newsletter for advertising folks who want to stay on top of the AI mayhem" and not a publication with any credibility in linguistics.

None of that means it can't be true, but some basic skepticism is warranted here. Otherwise we end up in a situation like the LK99 room temperature superconductor where a lot of HN commenters were also upset at the cynical "downers" who just couldn't root for a good thing/progress.