From HBO's Making Game of Thrones website (and probably a bunch of other places):
So, I guess all of us will be able to find out ahead of time whether the show looks to satisfy our requirements. Myself, from having seen all the preview material several times over, and from having read multiple interviews with Dan and David, I believe that they are trying to stick to GRRM's vision as closely as they possibly can.
... don't forget that the first 15 minutes of the season premiere can be seen tomorrow night (Sunday, April 3) at 9 PM on HBO and will be available here on "Making Game of Thrones" immediately after it airs.
So, I guess all of us will be able to find out ahead of time whether the show looks to satisfy our requirements. Myself, from having seen all the preview material several times over, and from having read multiple interviews with Dan and David, I believe that they are trying to stick to GRRM's vision as closely as they possibly can.