scalesusa, you say that "Right now, Nikon has not uped the ante"
This can only mean you are not working with these two side by side, Nikon has left the EOS 1Ds MkIII for dead with the D3s. I can promise you Nikon are blowing Canon away right now. The quality, the low light ability, the incredible ability to run tethered shooting bursts of 30+ frames non stop with Capture One, and the amazingly sharp glass.
The difference is as great as the one Canon made with the original EOS 1 which got me, and everyone else, to sell my slow and awkward F4 and make the switch to Canon.
The appaling mess of the G12, which I hate, after the G10, which i loved, has really put me on alert that Canon may well have lost the plot, and not be listening to people who work with the things everyday.