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From the link I posted above, it sounds like he was using in-camera lens coding, which one assumes would make some corrections. But, the preliminary information is not very definitive or helpful, IMO. My feeling from this is the in-camera corrections might be more related to vignetting adjustment than color shift, but I would also be surprised if color shift was entirely absent. The greater likelihood is that it is less of a problem than with the M9, which probably means that in 'normal' use it won't be noticeable if lens coding is turned off.
Of the officially released images so far, I believe the widest angle lenses used have been 35mm, so there is not much to go on at the moment. There are also the Jean Gaumy images from Kyrgyzstan, which are all shot on wide angle, but it appears 28mm is the widest he used (images retain EXIF, so you can double check if you like). There doesn't appear to be any edge color issue with his images, which can be seen here.