Well, between books, periodicals, and various computer screens, I'm pretty much reading constantly; most of the day anyways. As for the amount of time I spend with works of fiction... that varies considerably from week to week, and month to month.
As for the GRRM novels, I don't think I read quite as fast as many of the rest of you. I like savoring each moment. But I just recently reread the series, and I think the three books took about a week each. I seemed to sacrifice more and more sleep with each passing day. Until the end, that is, and then the withdrawal symptoms started to kick in. This forum has been kind of like a support group, in fact, easing the transition back into normal life. Thanks, everybody!