D800 handheld hype nonesense - model shot handheld with 200/f2 at 1/30

Possibly, possibly not. For a start, blurs all add in, it's not that one subsumes the other unless the amounts are very different. So the D800 will still add less blur than the D700, even if neither of them is producing of their sharpest due to shake. And the other thing about shake is that it isn't totally predictable, so while at 1/30, on average they might be pretty wobbly, that doesn't mean that there will be no sharp ones.

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Bob