It's a modified type of point shooting I suppose, but what's the point? Even the "expert" they quoted said it was less accurate than using sights. But if you're in a real hurry, simply focus on the front site. You won't build bad habits by switching techniques when you want to actually aim. In addition, I imagine some semi-autos might experience some feeding issues when fired sideways (most probably will be okay).
Jim's Rules of Carry: 1. Any gun is better than no gun. 2. A gun that is reliable is better than a gun that is not. 3. A hole in the right place is better than a hole in the wrong place. 4. A bigger hole is a better hole.