Well, I did not mean that to be a real, hard, solid statistic. However, the examples of good stunt casting to me seem to be vastly, vastly overshadowed by the disasters.
Off the top of my head...
Bad stunt casting:
Joey Fatone in Rent
Melanie Brown in Rent
Drew Lachey in Rent
Joey Fatone in Little Shop of Horrors
Christy Carlson Romano in BATB
Vanessa Carlson in Into the Woods
Good stunt casting:
Frenchie Davis in Rent
Jai Rodriguez in Rent (this may or may not be an example of stunt casting, as he was in the show both before and after he was famous)
The R&B divas in Aida (though this could vary from diva to diva)
The Entire Cast of Spamalot
Okay, so, judging by the above, my statistic was waaaaaaay off. But cut me a break! I'm a fifteen year old... I've never taken a statistics class! Yet.
"I mean, how many of us could honestly say that at one time or another he hasn't set fire to some great public building?"