I've just quickly Googled the issue and some people are speculating it's down to the very limited EU sample numbers (which would make complete sense - I heard about that long before this KG issue arose) or that KG may have broken NDAs by releasing confidential information as a first source i.e. not just repeating it.
http://www.reddit.com/r/Games/commen...over_negative/
To quote someone from that, along the lines of what I'm thinking so far:
And as others have said, it's not like they were ever going to be able to keep a sample out of their hands down the line, and it makes very little sense from an AMR PR perspective to pull a stunt like this - if they'd pulled samples from other sites I'm sure we'd know about it by now, and if it's a last-minute thing then that could tie in with the NDA-break theory?