That's because it's a direct re-publish of an answer from Quora (note the "contributor"). The decrease in quality may be that the Forbes you knew was sold [1] in late 2014, and the current state of the company seems chaotic at best.
My guess is that from a PR perspective they might have worried that releasing the information without a definitive scope of impact would have led to days of wild panicked speculation in the media outlets, and userbase.
While there was still wild speculation, security was only one of many possible scenarios being discussed, and it was mostly treated like a regular outage.
I'm not saying this delay in disclosure was "right" (what if it had ended up worse in scope?), but I agree with sibling post (dave1010uk) that it seems to have worked out better for their brand.
It seems that if KH translates seamlessly between HG and Git that a project could accept pushes from both, right?
I assume since KH is not open source / free that this would not be an acceptable method for maintaining the main repo, or that the translation would introduce interesting wrinkles, but it does seem like one could potentially have his cake and eat it too.