Ehh, I better break this bubble before it gets too big:
No such interview was on the September issue of Tech Gian, nor does it contain any information about an anime adaptation of Kara no Kyoukai.
The real page 311 of the September Tech Gian looks like this:
So, let's start with the conclusion:
The image of the "interview" is a well-made fake scan, the "interview" does not actually exist, and naturally, everything on it is false information (in hindsight, they did say a lot of things that were unbelievable. Sacchin scenario, for example ^^; ).
There has been no words anywhere on 2ch, MOON PHASE, or other news site about a Kara no Kyoukai anime either. So it's confirmed that this was just an isolated prank image.
...Quite unfortunate, really. ^^;