Yes, carbide will cut a correct angle and give one a sharp blade in one or two swipes. From the photo above (if you can get past the one of Kelly Monaco), the edge may be acceptable to some, especially if they're into the mini-partially-serrated, plain blade knives. But even if not, wouldn't an edge like this work off within a few months of normal use? And if not, wouldn't the edge, applied straight against a fine ceramic stone provide one with a straight, but dull edge which could then be sharpened?
If one needs absolutely clean slashes, I can see the alarm; however, I'm not sure I would have bothered sending it back to CRT.
Oh, and by the way, both Gerber and Lansky make ceramic rod sharpeners that are cris-crossed and can be taken out into the field. Both are excellent, though the Lansky people did have the foresight to make a sharpener that can be easily taken apart and cleaned. Gerber's sharpener is designed so that the rods are permanently embedded in the plastic making it very difficult to sharpen. But again, both are fine ceramic sharpeners that are best at maintaining an edge rather than providing one.
Confed