What I want to add is the value that the fandom has due to the length of time between books. Once the series is complete, new readers will be able to whiz through the entire series without having to ponder the multitude of mysteries throughout. This provides a unique experience for those of us reading as the series is being written.
I am always amazed by the depth and variety in the ASOIAF fandom. I especially love reading the numerous blogs that delve into the layers of the saga, bringing outside knowledge to add insight to the saga and speculation to the various mysteries in the ASOIAF universe. If the fandom did not have these wait times between each book, much of this creative speculation would never be developed. I believe the ASOIAF fandom should think about, and appreciate, the value that our diverse membership adds to the experience we are living through, as we wait for Martin to finish his masterpiece in the manner that he deserves to.