DXOMark has released their findings for the Nikon D3s and Canon 1D Mark IV.
It's about a wash between the 2 cameras outside of what we already knew. The high ISO performance is superior out of the camera on the D3s and it's lower megapixel/larger sensor.
Again, take it for what its worth.
Read More: Direct Comparison
Read More: Canon 1D Mark IV
Read More: Nikon D3s
Canon EF 70-200 f/2.8L IS II
The lens will retail for $2499 USD. I'm still searching for places in North America to preorder this thing. I have yet to see pricing in Canada.
thanks Skip & Adam