Maybe he's just jaded about giving interviews? I know if I worked at SQEX and busted my ass with FFXIII, the ridiculous reaction online would leave me a bit jaded. People rake them over the coals for 4 years, then act surprised that he's not cheerful.
Compare it to the way the Diablo devs acted when they get comparatively minuscule criticism, or Bioware. They flipped out, publicly.
This is true. Compare the reaction of Bioware to DA2 and Square to FFXIII. Bioware basically said 'fuck you guys, we're still gonna continue with this trend but we'll polish it a bit more next time. Square said 'okay, here's most of your complaints addressed but we couldn't get a better story together because our writers think that it was awesome'.