My sentiments exactly. Let's give it a break! Of course, if you were expecting some doubling of low light capability you can be disappointed. You can also be disappointed in the D4 that presents what appears to be a modest improvement in low light capability.
The day I receive my D800 (and I am very high on the list) I will immediately put a good lens on my D800 and do a side by side comparative test in low light conditions with my D700. I am sure a hundred others will do the same. Then we can whine if the results are poor. I doubt it.
I honestly think the AF and metering improvements will be very significant, not to mention the 36mgpxls and the video. But, hey, no camera is for everyone.