My fear, Lord Foul, is that Song of Ice and Fire will never see completion.
I've seen this thing happen before. I became a fan of David Gerrold's War Against the Chtorr in the late seventies, for Heaven's sake. And he's what - halfway finished over a quarter century later? Is Martin smacking his fans in the face like Gerrold? No, but the ominous signs are starting to emerge.
At least King finally knuckled down and completed his magnum opus. He was already my favorite writer, anyway, but when he did this, I've come to admire him even more.
I realize Martin wants to make this work the finest it can be. Well, he did just that with the first three volumes, and he didn't take half a decade between books to do it.
Let's be honest - there is no way on God's Green Earth that A Feast for Crows will be published before 2005. Not if he isn't even finished writing it yet. And how much longer to wait for the final two (or three) volumes? I'm fifty years old.
If Martin was writing a half page per day, he would have completed Feast before now. I don't think that's too much to ask in a professional writer myself. But maybe that's just me.

"I am, in short, a man on the edge of everything." - Dark Tower II, The Drawing of the Three