The first time that I heard of this technique was the late 80’s or early 90’s. I believe it was in a book on advanced IPSC shooting technique. This was never used when revolvers where the dominant handgun, because they do not eject cases while firing.
You started seeing it in the movies, then it started being picked up by the gangbangers.
Much of gangbanger technique comes from movies. The whole idea of drug lords having lots of “assault weapons” came from the TV show Miami Vice. I have heard that police almost never found these types of guns in drug transactions before the series, but after, they were like “must have” fashion accessories for up and coming drug dealers.
It is another datum to show how much Hollywood shapes the views of the uneducated.
First, I am an accomplished competitive handgun shooter, who is best at speed events, such as bowling pins, etc. Pure BS!
If you want to shoot fast and accurate at normal 7-10 yard combat range, concentrate on the front sight, forget the rear one, and rely on a grip angle that fits your hand to put it instinctively on target. At 7 yards, I can keep all my shots on a target the size of an orange if I take a hammer and knock the sights off my handgun, in other words, don’t even look at them. I can do this two handed, by locking on the target, shooting at waist level. It doesn’t happen with the first box of ammo, though!