To be honest, I can't critique firearms or people and their pistol craft like you. Nonetheless, I could tell in those first 3 video clips that those guys had good control over their pistols, moved well, and fired not just with rhythm but
fast.
The shooter in the first video I was
very impressed with. He fired a lot slower then the guys in the two following video clips, but the guy seemed poised for combat. As you mentioned, he utilized a modified weaver stance in that first kneeling position - as he walked and fired on the targets it seemed he was in the weaver or slightly so in that too. His double-taps weren't any spectacular speed (but you can only shoot as fast as you can hit anyways) but the guy shot from ease in his "weak side position," not to mentioned transitioned fluidly and with ease to the weak side. I don't think I could have done as well. I liked how he covered both targets (from the seated position) at the end even though he did not fire on them.
The shooting in the follow to videos is
fast. No way I can shoot that fast - not if I want to hit anything.
That last video, of this guy Jerry Miculek, was just INSANE. With a semiautomatic I should have no problem placing three rounds on a target in 2 seconds from maybe 10 or 15 yards (if I practiced - I haven't fired a gun in a loooong time). This guy, however, is so insane he's scary!
I have never seen anyone fire a pistol let alone a revolver like it was a fully automatic rifle. That must have been some modified trigger pull.