Most "real world" data is anecdotal hence all the bashing of Marshal and Sanow.
That is why I believe what I see. I carry and recommend what I know works, and do not recommend what I know does not work. I have seen enough people shot in enough different situations with enough different guns/ammo combo's to put faith in the 357 magnum and not the 38 special. That energy does SOMETHING, sure we cannot quantify it in a lab, but it is what it is.
For real world data one simply needs to find police reporting on officer involved shooting. Just because you dislike one messenger, does not mean they all have the same message.