That might be the dumbest possible explanation or actual design of a card yet. He bangs on about how they put holes in the PCB to let air be pushed through the heatsink and straight out to pcb, in a straight line in effect, to reduce the pressure.
Now the major problem with that is one there won't be large holes so it would be nearly pointless anyway as the majority of the air will be turbulent and being pushed sideways anyway. Second, and the biggest problem, they stuck a giant backplate onto the back of the pcb. So if there are holes in the PCB, they are all but covered on the back, what great design. Then if they are worried about reducing air pressure and giving it somewhere to escape, why have they covered up the entire length of the card on one edge with shrouding with one tiny hole in it. That will do nothing but slow down the airflow.
It doesn't look like a particularly bad card, but why make a more complex pcb that has holes put in it, it costs more money, and they serve basically no purpose even if you didn't cover them up on the other side... but you did.
So you apparently know better than their thermal design team? Ok, makes sense.....