I was at the range last Sunday, and for the first time my Glock FTF. My first instinct was to tap, and rack. Just what you would do in a real world gun fight. But as I learned in my basic pistol courses you keep the weapon pointed down range, and wait. My mind was flashing on the worst case scenario. After a tap, and rack the round exploding out side of the chamber, not good for me or the guy next to me. So I waited, and no bang. As a side note, I examined the round the primer had a light strike on it. I put it in the next mag, and it did go bang.
You fight as you train, and a FTF in the middle of a gun fight could cause you to loose, depending on lots of factors. One of them could be, your fallowing the wait rule or tap, and rack.
If you are well trained I suppose you would find cover, and by that time a tap, and rack would be safe.