Mechanisms with free floating firing pins are susceptible to slamfires anytime the firing pin makes contact with a primer.
I think that Mr. Oldham should probably reconsider his comment after careful examination of the way the gun and the Series 80 system functions.
While technically true, the spring-loaded inertial firing pin doesn't really offer much chance of that happening unless the hammer is held at full-cock for an instant, and then jars off as the slide goes home, and even that requires that there's a problem with the sear reset. If the sear resets the way it's supposed to, the half-cock will grab it and arrest the hammer.
Look at the M1 and M14 rifles. The firing pin isn't an inertial type, and there's no spring to oppose it. Eject a fresh round that's chambered during normal cycling, and you'll see a tiny dent from the firing pin every time...yet they don't slam fire on any sort of consistent basis...even with soft commercial primers.
On the Series 80 system...when the gun chambers a round during normal cycling...the trigger is pulled during the cycle, allowing the firing pin to move forward freely...yet we don't get burst-fire unless something else is wrong with the fire control group...neither in a Series 80 nor in a pre-Series 80 pistol.