I think most of you guys are missing a mojor point here in this hijacked thread (which has magically become a glock vs 1911 pissing match).
Does your department provide you with free ammo for the 40?
If so, I say go for it. I'm all about the PD paying for my training and duty ammo.
I like Glocks, and more police departments in the US use the Glock 40 than probably anything else. If they were grenades, I betcha it would be front-page news and everyone would be using sigs.
Yes, some Glocks have Kb'd with factory ammo. So has everything else. It happens. Either bad guns or bad ammo. Gun makers blame the ammo, ammo makers blame the gun. Noone will ever know why it really happens. You sure ain't gonna find the answer here on the internet. But it sure is fun to watch people argue.
BTW - the 19/23/32 size gun is perfect for concealed carry IMHO. Small nuff to conceal well, big nuff to shoot well and hold lots of bullets (please don't anyone tell me all you'll ever need is X amount of ammo unless you've been in dozens of gunfights and have never missed and everything went perfect - and even then I'll still think you're full of shit).
I think the long and short of it is I'd feel fine with the 23, and see no real glaring reason why you shouldn't. As long as you get free ammo.