I know there has been a lot of excitement about the new XD-S 9mm, so this isn't meant to bash anyone who wants one and I didn't want to hijack anyone's thread either. But I can't understand what all the excitement is all about. The XD-S 45 ACP is a truly unique gun in that it merges 21st century innovations in advanced polymer frame, striker fired handguns with the older 1911 frame single stack design resulting in light weight perfectly concealable weapon with the powerful ballistics of the 45 ACP. A one of a kind gun in today's market (soon to be copied by others I'm sure). The new XD-S 9 mm is a mystery to me however. LAST TIME I CHECKED, 9MM ROUNDS WERE ABOUT 20% THINNER THAN 45 ACP. So in keeping with the innovative spirit of the line, a single stack XD-S 9mm itself should be roughly 20% thinner than the 45, resulting in an even more concealable weapon yet. This is obviously not what has happened. I don't want to say that Springfield was lazy with ths gun - but they were. A 9mm XD-S should be sized more closely to a modern .380 auto, not a 45. Instead I undestand that Springfield up-sized some components like the barrel to fit the thicker slide. In other words, if one CC's an XD-S 9mm you are carrying around extra material put there by the designers to make the gun bigger than it actually needs to be. Just doesn't sit well with me.