To each their own indeed. I would be curious to see how those stats would look if 9 and 40 were cost equivalent.Again, that's because 9mm is cheaper. Does 9mm take the crown because the majority of the guns used in that study fire 9mm? Anyways, to each their own. I like my .40 more than the 9mm.
I prefer my Beretta to my dad's M&P 40. The recoil is harder to handle on that gun and I find the trigger is garbage, and somehow - still have not figured out what is causing it - the trigger pinches my finger and after a few mags the bottom side of my trigger finger is a blood blister. I'm not an extremely experienced pistol shooter so its most likely my fault, but I'll still take my 9 any day over the 40. I'd like to try a nice glock or something chambered in 40 to see if it changes my mind. I had my eye on the M&P Pro because it felt much better in my hands than the standard but havent had the chance to try one out