Good catch. Yeah the U.S. site has been known to have errors at times (usually the result of copying and pasting inappropriately like you said).Just something I'd like to point out after noticing this: the above description is also found on the page for the PB, and we can be pretty sure that the PB is not DLC coated everywhere, for $600. (so, we can assume this statement above for the TVA essentially carries no weight) I suspect someone at Casio is doing a copy and paste of text from another listing.
* To be clear - I think the TVA is DLC-coated everywhere. But I don't think that ref'd statement proves anything one way or the other.
The pic below was taken from the Tokyo Twilight model's page at gshock.com: