Hey Argus, if the quote above is taken to support carrying a fixed blade over a folder because it can be deployed a little bit faster, I remain unconvinced. I mean, is that fraction of a second you might save even the issue in self defense situations?I am skeptical. If you watched the video that drop bear posted in which a guy, very well trained, deployed his folding knife under ideal circumstances, standing straight up and facing an inanimate target (a balloon), he drew, deployed it, and stabbed pretty much as efficiently as anyone can expect to do, and it still took about 2.4 seconds, if I recall. I'm sure you can imagine just how many stabs and cuts your opponent can deliver within that time frame.
I'm serious. Try this against someone who is coming at you with repeated thrusts and/or cuts while you try to deploy your knife. It is extremely difficult to deploy a folder from your pocket, even if you've poured many hours of practice into this.
If somebody suddenly and violently attacks you, totally "out of the blue" at very close range --especially with a weapon such as a knife, club, bottle, brick, rock, speeding truck, or handful of dog-poo, I doubt if you will have time to adequately defend yourself regardless of what you are carrying.
Fortunately, other than in an assassination, most people do not attack without giving some warning signs. Awareness, avoidance, de-escalation and retreat/escape are far more important than what you carry.
...and on the bright side, dog-poo is rarely fatal!