Just decided to jump in this thread, and watched the video in question. When someone's first argument as to why a particular caliber is good or bad refers to *ahem* the size of someone's manhood (he says it differently), I can pretty much ignore him.
His next argument is that he doesn't like high pressure rounds in any gun, yet says he says guns should be chambered in .45 or 9mm (um, operates at almost the same pressure as .40) only. He obviously doesn't know what he's talking about.
He should just come out and say, "Um, my opinion is that .40's suck because I don't like the recoil."
Instead, he goes on for 6 minutes, giving opinion as fact, and trying (and failing) to scientifically prove that the .40 is a bad round. I don't shoot .40, but if it works for you, more power to you.