I think you're both missing the point here. Remember, he was talking about the 9mm, .40, and .45; and the point is that the actual difference between the three is very small as far as terminal ballistics are concerned. Too often people pick the .45 thinking its far superior to the .40 and the 9mm; or they pick the .40 thinking its far superior to the 9mm. But that's just not the case. And they are all vastly inferior compared to a rifle such as an AR-15.
0331: "Accuracy by volume."