As the article states this is a product of the ammunition. The article does not mention what ammo is used. If you are using 9 mil range (training) some of you argument is correct. If you are using defense rounds like hollow points or polymer rounds they are loaded a little hotter and are designed to expand and tear up more tissue or organs. Add a +P round in a 9mm that is designed to handle it.
BV is in question time out indefinitely, until he takes the pledge to answer questions one for one.