KnC has not implemented Scrypt N in the Titan's firmware yet, at least not officially. They are still struggling to get the Titan mine anything but Litecoin in a decent manner. This information can be easily found on KnC's forum. If anybody claims they are mining Vertcoin with a Titan they must be better software engineers than KnC's. I strongly doubt it.
I dunno, just going off what this guy said. I don't doubt that Bitmain will be shipping working miners next month tho...