Switching for ergonomics is a weird one to me. After a few months with a camera, you’re used to it and it becomes second nature. I personally fumble around with Nikon’s pro bodies, but that’s because I have been shooting Canon predominantly for a long time. Had I always shot Nikon, I’m sure the opposite would be true.
I'm not so sure about that. While yes, you can get used
to any control layout, there is something about Canon's control layout (buttons and dials) that just works better. The only complaint I've had about Canon's button layout is the DOF preview button on my 7D, however that's been fixed with newer DSLR bodies (it's now in the PERFECT place.) When it comes to controlling all the critical settings without ever taking your eye from the viewfinder, Canon 's button layout trounces Nikon's. I can change just about everything without taking my eye from the viewfinder, and without moving my fingers very far from the shutter button. The mechanism by which you switch modes to change things like ISO, flash compensation, AF point selection, etc. is so simple it becomes a procedural memory thing. You can fly through settings changes while your still tracking a subject in motion, and get back to shooting in a heartbeat. That isn't just because you know the system...it's the specific layout. Canon NAILED it. Nikon...they get some things right, and some things wrong (and some VERY wrong.)
This isn't the first time I've heard a Nikon shooter rave about Canon ergonomics. There is something about it that is indeed superior.