Maybe... but not necessarily.

People in the market for a Nikon D800 are likely to be somewhat knowledgeable about digital photography. You [Taym] and I are not world-class experts on the subject, but we both know that anybody claiming to create usable photos at ISO 25600 is exercising extreme marketing hype, and not only that claim but perhaps others they might make become suspect.

Such a claim would instantly bias me against the Canon, and their "marketing tool" (in my case at least) would work against them.

tanstaafl.