Well, depending on how your survey's questions read, I suppose it's easy to believe that 63% use mechanicals. I "use" mechs. as well. For critters such as antelope, coyote, and turkey, but when it's comes to BIG game such as elk, I want penetration so I choose to use Snuffer SS from Magnus.
If every shot was a 20 yard broadside shot, I'd probably even use mech. for elk hunting, but not all shots are short and there's a possibility that the arrow might run into some heavy bone.