Not affected in the same way. The original M1911 design has a floating firing pin held back only by spring tension, so in theory it might be possible to get it

Not affected in the same way. The original M1911 design has a floating firing pin held back only by spring tension, so in theory it might be possible to get it to discharge without pressing the trigger by dropping it straight onto the muzzle from a sufficient height. This is so unlikely in practice that it's not a real concern. Some newer variants also incorporate an extra internal safety that blocks the firing pin from moving.