Hi, guys,
The 1911 was designed as a combat gun and empty mags should fall free when the release is pushed (sorry, Preserve Freedom). In a real nasty situation, the off hand should be reaching for a loaded mag, not trying to pull the empty one out of the gun.
For those who buy super expensive mags, there are floor plate pads to protect the investment. For those of us who buy cheap GI mags, it doesn't matter. And one can always catch the mag in a non-critical situation.
Jim