My best full-frame lenses (like the 85mm F:1.2) are from Canon. But I really had not dared to hope that Canon would counter Nikon's compact-and-cheaper full frame initiative, and definitely not this soon. But, surpriiiiise!
... Not a lot cheaper, though. $2,900. Sigh.
Update: Oops, body-only it's just $2100, like the Nikon D600. That's more like it.
D6, D600... at the same price... in the same week... I wonder if Nikon's and Canon's R&D departments are in the same room?
It's speculated that these new full-frame cameras are a response to the push from Micro Four Thirds and those systems. Because those are so good now that it's hard to justify the bigger size and weight of normal reduced-frame DSLRs. So I guess they want to push some not-too-huge cameras where you can tell the difference in image quality.