Shooting while focusing on the target instead of the sights seems to be "coming back around" again. I've been shooting since I was 16. This idea has never really left, but has come and gone in popularity several times in the intervening 26 years of my life. It seems to be coming back into vogue again.
My opinion means squat next to Lamb's, but here's my take on it: if you can't get the gun up to eye level and need to shoot somebody or somebodies, it can be done at waist level, just out of the holster (the Speed Rock). On the occasions that I've done this drill-and I've only ever done it in classes and on the range-I've made same hole hits several times. Perhaps I should shoot from there more often...except that the distances are about as far from the target as one wall is from another, minus the depth of a couple bodies, in a hallway. Otherwise, making hits, especially as distances widen, happens most accurately with sights.
In case you're saying "who's Kyle Lamb?" Here's a thumbnail: retired as a Sergeant Major from the US Army, most of that with Special Forces Operational Detatchment-Delta, AKA The Big Boys, and known in popular parlance as Delta Force. As I understand it, one of the last jobs he did there was as the Force Mod guy. That's the guy that determines what new equipment meets the standards and needs of America's best combat shooters. He was there in some of the worst places American fighting men have ever gone, including Somalia (yeah, he was in the Battle of Mogadishu) and Iraq, among other places that can't be talked about. All that to say, he knows what it's like to be shot at and return fire, and made a career of it at the highest level possible. When Lamb talks, only a fool fails to listen.
And, because its cool and because this the standard of excellence, check out the 2X2X2 drill. Watch Lamb's last run at the end, and realize that these are "A" zone hits; his controlled pairs are right on top of each other at a speed I'm not even near. 1.26 seconds...Wow.
1 year ago