I would be worried if the plate doesn't perform to the standards it claims to reach. If PLA is issuing lower tier armor, it is ultimately a procurement choice. If there is an overclaiming, then that is a problem. If the guy didn't test the plate as it was intended to be used, then he is just pandering to memeposters, deliberately or not. How he answered that query screams wrong testing BTW. He answered it in a passive-aggressive way and what he wrote is irrelevant to what was posted. Why he didn't simply write "I tested with a backer" if he indeed did?