Yep, I don't know how accurate that survey was as a whole, although I have seen many folks who did that very thing. If it was a magnum, they didn't even shoot a cylinder full. "That's good enough" seemed to be the Universal saying, then it goes in a drawer/truck,etc. "There if you need it" is their mindset.
I had a Charter Arms .44 Special Bulldog years ago. With the old 246gr lead factory load, it was very plesent to shoot. When I handloaded some "defense loads", it was a brute! ha I sold it to my BIL, who shot it a few times, and it may still be a drawer some where!
Thanksfully, there are many good .38 Special defense loads now that are fairly easy to shoot from a snubbie. I even like the Glaser and MagSafe stuff for in the home. Very wicked indeed!