Heres the way I see it, it may not contain direct spoilers however it is an interview. Interviews contain spoilers in most cases. I'm under the impression that this forum is meant for speculations and the other is for interviews, spoilers, cheats and such. Thats my outlook.
My rule of thumb for spoilers is content that actually reveals specific details about the game's story, characters, quests, etc. My reasoning being that if all interviews went to the Spoilers forum, then it would be more difficult to discern between what actually might contain a "real" spoiler, and what's just an interview talking about more general things. (I, at least,) wouldn't want to have to go to the Spoilers forum every time I wanted to see if something new had been revealed, but still didn't want to to know too much about the game's plot and quests.
The interview this thread refers to just contains general gameplay information and such. He doesn't go into specifics about quests or anything like that. So I figure it can stay where it is for the time being.
