Snappy recoil my a$$....Everyone says this, but I shoot my G23 at a much higher proficiency level than the other several 9mm glocks I have had....Maybe I was just made for the .40...lol...I reload so I dont really keep up with the ammo cost part.
I've never had a problem with it honestly myself although my first handgun was a 380..then upgraded to a 357 sig, then downgraded to a .40 and was very proficient with it..However once I made the switch to a .45 acp I noticed just how much less recoil there was in a more effective package. I can't say what .40's like compared to 9mm as far as recoil goes in honesty, just what I've researched and read. Never shot a 9mm to be honest. But .40 is more expensive than 9mm, not much better ballistics, more recoil, not much cheaper than 45, more recoil IMHO than a .45 and not as effective.