With todays litigious society the ammo makers are not going to produce ammo that will easily grenade.
That was the whole point of the article. With 180's they have to purposely download to reduce the possibility of an overpressure load. Lighter bullets, according to the article, can be loaded to their full potential with less risk of a gun blowing up in your face.
I'm neither agreeing, nor disagreeing with the article. It is an interesting concept that may have some truth to it, but I'd need to see more evidence I no longer own a 40, after buying a 10mm I didn't see the point, but I did always felt the 165's were a better choice from the 40 when I owned one.