Whoa! Some strong opinions to be sure. Actually, blades67, the reason it is a proven fact that a manual 1911 style safety can give the owner extra time to either fight or get away is that there ar MANY documented cases of this, particularly among LEO's. I don't have the data in front of me, but it is retrievable. The lefty argument against the safety is a valid one. I don't know how fast or easy the safety is to disengage with the index finger, however, it's possible that the safety can be put on the right side of the gun for lefties, if it can't, index finger disengagement would have to be fast and sure under stress.
Squeeze makes a good point. How fast can one disengage the safety under stress. Well, I've carried a Browning Hi-Power before, and the safety is extremely fast to disengage, and can be done during the draw stroke as the gun is brought up to target. Since Cominolli's safety works the same way, it may be just as fast, but this would have to be confirmed through testing.
I guess I am sort of a proponent of an external manual safety, even though I carry a box stock Glock 19 every day. However, there are only two types of safety I like--the P7 style squeeze-cocker, and the 1911 style frame-mounted sweep down safety.
Oh, and the point about the whole thing being a training issue is largely true. You should never put yourself in a position or allow yourself to be duped into a position where you have to fight for your gun. However, that being said, anyone can get ambushed, surprised, or outnumbered--no matter how much training you've had--and it's kind of nice to have that little bit of added security when things do go bad.
By the way, Operator11 and I are one in the same, in case that wasn't clear.