But! The article doesn't draw one conclusion that absolutely must be drawn if we don't accept the classical-mechanical interpretation of the experiment. And in that article, the author "refutes" it. Precisely, in quotation marks, "refutes" it, because he doesn't even know the theoretical basis to refute it. So, if we try to interpret this quantum mechanically, we will have to introduce "spooky action at a distance," as Einstein called it, meaning that one photon interacts with another over vast distances (at least 150 km, it seems, without any noticeable delay). More precisely, maybe it's not actually necessary, but the author of the article, and not only him, does exactly that; otherwise, the effect wouldn't have attracted people's attention at all.
Such "spooky action at a distance" looks so absurd in light of the existence of a simple, elementary classical interpretation through the law of conservation of spins... There's nothing to comment on.