If it will help put your mind at ease, I'll explain a major difference in the trigger action of a Glock versus most other semiauto handguns: the trigger does not just release stored spring pressure in the firing mechanism, like other designs. When you pull the trigger on a Glock, you are actually compressing the striker spring the rest of the way, just prior to releasing it. Glocks are not fully cocked when the slide is cycled; they are partially cocked, and the trigger finishes the cocking action just before firing. That's why Glocks are separated from the otherwise very similar Springfield XD models in most competition categories -- the Springfields are fully cocked when the action is cycled (you can see the end of the striker at the rear of the slide, waiting to be released), so they are categorized as single-action autos. Glocks must have the cocking completed by pressure on the trigger, so they usually end up lumped-in with the double-action or double-action-only autoloaders.
Originally Posted by chieninhouston
As long as you carry your Glock in a properly-fitting holster which includes a fully covered trigger guard, and absolutely practice keeping your finger off the trigger until the sights are on target (both of which are preached as critical rules for ANY handgun user), then you'll be fine carrying with a loaded chamber.
"Placement is power" -- seen in an article by Stephen A. Camp
(RIP, Mr. Camp; you will be remembered, and missed)