I'm not a complete traitor, I just like a little action on the side. And using what I have access to. I certainly won't be switching anytime soon. I shot a wedding recently and had to use a D300s as my main body because I didn't have access to my own 24-70 but I did have access to a Nikon one. I also brought my 7D with a 70-200 but that's not particularly useful in the church for shooting the ceremony. I've used the D300s enough that I'm comfortable with it and know how to get around. The experience confirmed for me that I will never
switch to Nikon. Familiar or not I vastly prefer the Canon layout ergonomics. Thumb wheel for the win! There were some other issues too, particularly I felt I was waiting for the camera in situations where my 7D wouldn't break a sweat. And that would be using the same CF cards. Nothing rigorously scientific of course, just some real world experience. That said, my 24-70 USM motor died and the Nikon one worked fine.
But that won't stop me from playing with some pretty neat glass; there's a Nikkor 105mm f/2.5s in the bag I have had a chance to play with a little bit and it looks like it's gonna be a lot of fun. One more check mark in the list of Canon benefits, there's almost always an adapter so you can attach just about any lens you like.