“Practically speaking, there can’t be more than about 250 (pages)more...1550 is the limit. Any more and the binding won’t hold.”Given that a few weeks back GRRM confirmed he was on page 1311, it appears that he's getting dangerously close to the limit.
This of course doesn't mean he's nearly finished the novel - it's not a case of "just another couple of hundred pages and it's done." If anything, this revelation creates more problems, and again hints that splitting the book in two might be necessary if GRRM goes over the limit. If for some reason the publisher is reluctant to do so (unlikely, since it would mean much more of a profit), then GRRM might end up having to go back over the novel and start removing scenes and chapters, which could be both problematic and time-consuming (and this might not even be possible, given that he's said before these pages are 'locked' and have been edited and finalised already). Ultimately, it all depends on whether he can wrap up the novel's story-arcs within the remaining amount of pages he has left. Whatever happens, fans are going to have plenty to get their teeth into when the novel is finally released.
And when that might be, GRRM naturally refused to divulge:
“I don’t do deadlines any more. I’ve been scarred too many times...Whenever I get close to a deadline, I can feel it bearing down on me. It doesn’t help. It actually hurts ..... and I wind up doing nothing.”He also touches briefly on his fans-turned-detractors:
"I get these letters from the lunatics saying, ‘You better not pull a Jordan on us'...That really angers me on a bunch of levels. One, they’re speculating about my death and two, they’re diminishing Robert Jordan’s death, who was a friend of mine, like it was some sort of trick he did to get out of doing the book...It’s pretty nasty stuff.”