Hmm, I'm not sure I'd endorse him just as highly. I think he has some really good bits; the intro of Jon snow is excellent, and he has Tyrion very well. But, it's still formulaic (but that's a criticism I find with a lot of fantasy), and padded. I kept reading, WP, but feast for crows is padding to the nth degree IMHO. I will get DWD, cos it seems to get better feedback, but I'm getting to the stage that, quite frankly, a jon snow and tyrion compilation would do me very nicely, and I'd skip the rest...
His writing is very good in places, he does show not tell very well, but he does repeat things he's already told you too often, and how many times do so many characters pound tables with fists when there's painful medical interventions? So far, i think every time.
Was he worth reading? Absolutely, especially to see how some areas of writing are done. Is he anywhere near as good as he's made out to be? Not in my opinion, but that's what makes the world so sweet.... we can't all like the same thing.
Oh, and I don't think he breaks the rules as well as some writers, Joyce and Burgess spring to mind, I think, whisper it, sometimes it's just not right....