I made the comment about Billy and Japanese game design because of how immediately he dismissed Dragon's Dogma.
Shitty title aside, I don't see any problem with a Japanese developer tackling western mythology or genres.
I personally get the sense that there's a segment of the gaming population that just reveres the Japanese development community, more for the memories from their childhood then the products they're actually putting out these days.
Last Guardian looks great. But I also think Japanese games are usually hampered by bone-headed design decisions, and there are a lot of people seemingly willing to give these developers a pass on the grouns of 'cultural differences' or eccentricity.