One word here,
Wild romainians test is silly, but the 1911 did not fire out of batteryas suggested by some here, the design of the 1911 precludes this, What happened is that the slide or the firing pin seated the high primer with its energy, then the primer ignited firing the gun. The striker did not have the energy to seat the primer and fire it.
Glocks do fire out of battery, this is a well known fact and responsible in part for some of the Kabooms.
If you doubt that glocks fire out of battery here is a simple test you can perform at the range.
load a glock any caliber, slow fire a couple of rounds, pick up the shells and examine the primer, you will see a round indent with a slight squarish mark.
Now rapid fire 5 rounds as fast as you can and pick up the shell casings and examine the primer. You will see an EGG shaped indent which is shallower at the top and deeper at the bottom
This means that the striker has hit the primer before the round is fully chambered and the slide is fully forward, and as the round is moving the slide with striker protruding is going forward and this causes the teardroped shapped indent on the primer.
Try this with a .45 1911 and you will find a round indent no matter how fast you fire.
By the way I like my glock 26.