Academics themselves rarely frame their research in sensational terms. This happens in press releases and media coverage, which they have little control over. You can see this by comparing the title of the press release to the quotes by the actual researchers:

"We’ve shown for the first time that the front of the brain arises from a totally different progenitor cell than the back of the brain."

"I was surprised at our findings because the word ‘brain’ implies a contiguous organ that likely has a singular origin," Jokhai said. "But even 500 million years ago, there were these separate neural systems, which now almost operate as one, which is very cool."

I don't hear much overselling or hype in this, I hear an accurate description of the research and a bit of nerding out over it.