The DP review on the Nikon D300 makes much of the camera's ability to correct chromatic aberration and produce sharper images by bringing the colour channels into better alignment in j.pegs: and in RAW but only provided the Nikon converter is used for processing. My habit has been to convert all my RAW images to dng files and then process in Adobe Camera Raw. Am I really losing accutance by doing this? If yes, does Adobe have any plans to update their converter so that it can make use of the appropriate Exif data?
AFAIK, there's no other source to coroborate DPR's view that CA related info is indeed written in the RAW file meta-data based on EXPEED processor analysis.
Much more probable (and sensible from a processing 'economy' point of view) is the hypothesis that Capture NX performs the same (or very similar) analysis and processing on the RAW files that Nikon's EXPEED engine does for the in-camera jpegs.
In fact, the Nikon converter has included this functionality for some time now. The new thing with the D3/D300/D60 cameras is only that Nikon has incorporated this functionality in their in-camera jpeg processor.
As far as the core of your question goes, it will be easy for you to download the trial of Capture NX and compare for yourself (and for your lenses) the efficiency of NX's auto colour aberration control vs. ACR controls.