not objecting to much in that polemic, but maybe some insight into the "brain is jelly" mode:
The beauty of the brain is its simplicity (and apologies to the professional neurologists in the audience for my poor representation): it's basically a bundle of neurons wired to sensors. What makes it work is a box in the back that releases chemicals, reinforcing the neural connections whenever something "important" happens: that reinforces certain neural pathways. If neurons fire without that box reinforcing it, those connections get weaker (this is what happens in REM sleep: neurons fire randomly, weakening the connections and "freshening" the mind). How to judge something important is part of the system as well, so that when and how much reinforcing chemical is released becomes very nuanced.
During a "high-pucker factor" event, certainly, on one side, adrenaline is going to make maintaining total situational awareness difficult. On the other side, that little box is gonna be dumping at Trauma levels: every second is going to be "remembered" in stark (if selective) detail.
All this is to say, part of the "Weird mode" the brain is in, is after-the-fact. The "time dilation" effect is how we remember these events, but is not how we experienced it. We remember it as being twice as slow, but that doesn't mean we think twice as fast.
But, again, there are professional studies on these things, and the good folks who build these things keep current in them. No system is designed in ignorance of these factors; but that doesn't mean they never fail.