Miculek, who holds numerous world shooting titles and records, had a couple of issues with “gangsta” shooting, the two biggest that his aim was off axis to the right and that he couldn't see any other target that might be to his right because his hand was in the way.
Another 'myth' I've heard is that with some semi-auto pistols, the “gangsta” style has another drawback, that being the ejected brass hitting the shooter in the face after each shot, something that would certainly affect one's aim. It may look cool on the street and on the TV or movie screen, but in real life most gangsta's wouldn't be able to hit the broad side of a barn. Then again, most gangsta's don't practice shooting regularly like many legal gun owners do, and they certainly don't practice anywhere near as much as Jerry Miculek.