Let's see...
NO DEMO
If I had to sink money into something I'm not even sure the public will like, I wouldn't do it either. The fact that there is no demo so close to release is a scary prospect for me as a gamer, let alone a distributor. We're down to just over a month now...
I'd bet BIS has happily handed out the E3 and GC Demo versions to any interested (or even not yet interested  ) publisher.
Just because there is no public demo does not mean that there is none for such purposes...
True. But if I'm a publisher, PUBLIC opinion is a VERY important part of my decision. I guess I should have put the word "public" in with my post. Sorry about that.