Lol, it proves everything. He even said as much in the article that for every "important" faceoff you have 50-100 faceoffs that are essentially meaningless. He also even dug into the theory that faceoffs are important because you gain possession(IE important to win a faceoff on the PP) and found literally no correlation to that being true. Good teams in general get the puck back quickly, bad teams give the puck up quickly.
I have also said countless time that
some faceoffs are important to win, like literally the last time we had this argument almost a year ago
Rumor: - 2022-2023 Trade Rumors and Free Agency: The Search for a 2C
I would actually say the opening faceoff in OT is the most important given how important possession is and how difficult it is to regain. Beyond that, a defensive zone faceoff late in a close game could be important.
The reality is(And literally countless studies have been done at this point, Icould go pull 4-5 more articles if you need more proof) that the result of the faceoff doesn't matter. What is far more important is what happens on the ice immediately after a faceoff(IE not just letting your man skate away from you freely like in the LA game) and also making sure you dont lose a faceoff cleanly.