Just tried this with a 'real' image, a paltry 55 megapixel architectural stitch. Sorry guys but the mixture of ACR capture and output creams PK IMO, far less mush in the fine details on problem subjects, I also found the output sharpening (normal) more to my taste than PK's. Faster to apply as well. Of course it's harder to use, no masks to work with, resizing for print, etc.
What I did was take my 2.2Gb file, flatten it, load it into ACR and apply Capture, open to PS for resizing (easier than trying with the clunky ACR method of resizing), save, reopen in ACR and apply Output based on the print size, open and print! Of course if you want masks for the capture all you do is open an unsharpened version then layer the sharpened on top. Bit of a pain but I'm so happy with the results I don't particularly care. What would be very very nice would be a proper size window in ACR where I can specify the size in inches and the relevant DPI. That would cut a whole stage out of the workflow but I know it's high on the wishlist for many with ACR...