Just about every handgun sports shooter over here. Although we tend to put one hand in the pocket, rather than bend it across the side.
It even works with that 1911 thingie.
http://www.xs4all.nl/~gmwege/mov/shot9.avi
But I must say I prefer the stocked versions.
http://www.xs4all.nl/~gmwege/mov/shot6.avi