The nine is fine, and I frequently carry one. That being said, no amount of FBI study will convince me that it is the equal of the .40, 10mm, or .45. Given equal placement, etc, the others are (at least) marginally better.
Now, if you told me (as the study appears to do) that the 9 is better because it is easier to make good hits and therefore shooters will be more proficient, I will buy that. All the BS of 'given current bullet tech' is just that. .40 and .45 bullets evolved too.
