It's half and half: the ColorOnGrayShadow images are done; there's now only WhiteOnBlackShadow and WhiteOnBlackEtch because iOS 6 doesn't use that awful silver status bar with colored icons combination anymore. See more in this post:
http://macthemes.net/forum/viewtopic.php?f=21&t=16812610
And read more
here, along with this awesome Winterboard tip:
"With the help of WinterBoard, it?s actually extremely easy to figure out the file names of every image in iOS. In WinterBoard?s ?Advanced? settings, turn ?Record UIImages? to ON. Every image that is not themed will be saved as PNGs into /tmp/UIImages. For example, if you want to theme Phone.app?s dialer, open the Phone app to the dialer tab and those images will then be saved into the /tmp/UIImages folder. Simply SSH (or use iFile) into that folder and those images will be saved there so that you can find the images which you want to theme and use the same names for theming"
Have fun!