Another question was, how much of the books was him and how much was RJ?
He said that for The Gathering Storm , Towers of Midnight , and A Memory of Light , he had about 200,000 words of written material including notes dedicated to that story . He also had dictations dedicated to the A Memory of Light material + dictations and the other general notes for the series. He made the parable of someone who has pieces of a Ming vase for which he had some pieces but others are missing and he had to put it all back together to make a whole. He did say that for this book, more of Mat was RJ and more of Perrin was him. I think that he has done a really great job.
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