On my camera (Nikon D800) there is a shutter setting called Q. It works by opening the shutter when you press the release and then closing it when you release the shutter release button. It's hard to get used to, but once you do you can shoot much quieter since you can time the snap-back.
I believe the Canon product line also has an equivalent to Q mode. Dunno for sure though, I scoff in their general direction.
On my 1D's, it's called "Quiet Operation", and it SEEMS to slow the resetting of the shutter, and drops the max FPS from 8.3 to 3.something. It does make a difference in 1-shot mode. No, I have never used it outside of experimenting.
Hey, Nikon or Canon. Who cares. 2 great tools, if you can figure them out.
Photography is about capturing light, not how big your dick is.