DxOMark released their test results for the Canon EOS 1Dx full frame DSLR camera ($6,799.00). The numbers show that Canon's flagship model is almost as good as the Nikon D3s that was announced back in 2009:
The 1D X doesn’t match up to the Nikon D4 in most tests, and costs $800 more, with image quality that is more comparable to the D4’s predecessor (which can still be purchased for $1,600 less), but the reality on both fronts is that a professional photographer who already has invested in Canon lenses is unlikely to jump ship to either of the Nikons (especially since the D4’s feature set is so similar to the 1D X). But neither is a dedicated Nikon shooter going to run and buy the Canon 1D X.