This may not be new in the dishonorable world of journalism, but it's the first time many of us outsiders get to look behind the curtain. We kind of suspected how the sausage is made, but actually seeing it is still shocking.
I will stipulate that the NYT editorial board has lectured Silicon Valley on diversity, though it is not diverse itself, and its female executive editor made less than her male predecessor: http://www.aei.org/publication/silicon-valley-gets-stern-lec... http://www.businessinsider.com/nyt-explains-female-editor-sm...
As for the rewrites, changing the lede graf to "entrenched sexist culture of Silicon Valley" is significant. It replaces neutral reportage -- "a week of ceaseless criticism" -- with the newspaper asserting as fact that Silicon Valley represents a more "entrenched sexist culture" than, say, the NYT newsroom itself. It's intended to frame the story in a typical high-level next-day NYT fashion by injecting the author's, or editor's, perspective. It's excellent journalism when it's accurate, but creates the type of controversy you see here when it's not.