Just proving my point. Selling speed fills a class. Selling boring methods that work simply isn't ###y enough for people. Mr. Cowan states that at the 3:37 mark. The discussion that the release is faster. Again, if your life depends on the speed of your reload, your tactics suck. You can't set the scene with so little context and say that a faster reload is absolutely the most important factor. Reloading without the use of concealment or cover is poor tactics. The result is a race between good guy and bad guy as to who can get their gun working and/or make hits first. That fight has nothing to do with methods and everything to do with pure skill, that is who is faster. If the good guy is faster at inserting a single round via the E port than the bad guy is with inserting a magazine and using the slide lock then it is what it is. That doesn't justify single loading as the "best" method or even a "great" method.
MR. Cowan also falls into the trap I posted about above. No one said your fine motor skills are ABSENT. Your fine motor skills are simply reduced/diminished. Comprehension is very important. He also falls for the "your mag release is and trigger are fine motor skills.." argument. Where he is correct, but you don't hav any other choice with those controls. That being said, both the mag release and the trigger operate in one direction only. The slide lock moves in two directions.
To dive a little deeper. We could add any number of other factors in the situation. Broken slide catch, injured hand(s), bloody hands, muddy hands, gloved hands, weaker hand strength, pre existing hand injury, lower skill set/experience, or single handed operation.
Using the slide works on ALL semi autos. It also works for both right and left handed folks. It mimics your IA drill and half of your RA drill. It also mimics your IA for rifles(for the most part). Using the slide is the only way to unload and show clear for the competitors out there. Your slide lock is a one trick pony, and it only works in 1 of it's 2 possible positions.
The mentioning of interlimb coordination was simply to illustrate that gross motor skills and repetitions motions take over from fine motor skills and relatively non repetitious motions.
Ok there I guess Larry Vickers and Jason Falla and numerous other SOF guys are wrong. You know best TDC/Kiddx.