D800 ISO noise on Aperture exported images

There has been some discussion on other boards that downsizing D800 images shot at high iso (3200-6400) to the size equivalent to 16 MP reduces the perception of noise such that the ISO performance of the D800 is similar to the D4 at same sized images.  The downsizing, as best I can tell, was done in PS. 
So I am wondering if any of you early D800 owners have looked at the effect of downsizing the image during export to a JPEG in terms of ISO.  If the same improvement occurs during the export process as when it is done within PS, then that would be great since it is JPEG images I usually provide to clients or upload. 
Also does anyone have metrics on import and export speeds of D800 files?

I initially felt that my 5D images were better. On the 1D3 there is a custom function II-2 that turns on high iso reduction (even in RAW). Without this on, the 1D3 is using the older DIGIC-II processing, with it on it uses the newer DIGIC-III processing. With this on I think it makes them as good or slightly better than the 5D (although with less pixels). However, Lightroom makes things look even better.
Here's a 100% crop from a low-light photo from Aperture:
http://caslis.com/tests/483I0673-ap-crop.jpg
Here's the same crop from Lightroom:
http://caslis.com/tests/483I0673-lr-crop.jpg
Of the images I tried this one image was the closest in both. In most cases Lightroom has far better. Even in this one, the Lightroom version looks better to me. Both programs had NR off and use the same RAW image.

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    Ok - sorry.
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