He seems to think that simply based on Burton's previous track record. And many of us have feared what Burton might do simply based on his track record (hello, dancing skeletons and clowns nightmare
). And some of Burton's comments did little to squelch that fear (chiefly his infamous flies comment). But I'm still trying to keep in mind that not all of Burton's films are "intentionally hammy and tongue-in-cheek," as the writer puts it. Though even that is hard when you have someone like Richard Zanuck saying the film will be "very funny" (though at least that remark was back when John August was writing the script).
If indeed there are comedic touches, I'm hoping they're limited to Barnabas finding himself in a world that's completely alien to him and having to deal with 21st century technology, and that such dealings are kept to a minimum. One could even hope that such scenes might even end up on the cutting room floor. But that might be too much to hope for considering even Jim Pierson has said that they specifically want to show Barn dealing in such situations.
The main thing I'm trying to take away from that article is that the writer describes both of Seth Grahame-Smith's books as "not campy," which only confirms how some forum members have also described his books. And that's exactly what I want to hear with regard to his writing style...