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Exactly (and sadly). The files I've seen from a Nikon D3x at 102,400 are just draw dropping (let alone what Nikon will be coming out with next). It's kinda sad to hear the initial reports that the 1Dx may suffer banding problems at 51200. I know, I know, who in their right mind needs ISO 102,400. Well, I do. I'm sick of shooting primes wide open in dark areas. What if I want to shoot avail light in a dark location and actually stop down for some depth of field?
1D-X is only ~1 stop better at high ISO than previous Canons. It's hardly amazing and I highly doubt will exceed the Nikon D3s' high ISO performance.