i'd be surprised if affc and adwd isn't split into 2 seasons each, giving him another 4 years to finish
Recent reports on the books front are that:
1.he's getting pissy with people asking him when TWOW is going to be done...
2. any dates you're reading are speculative until it comes from his website
4. he's been pretty clear that the show is the show and the books are the books... some people that have died in the show will likely die (or not) differently in the books
The show front, people aren't exactly sure. AFFC and ADWD events are parallel on the timeline. They happen at the same time. He just couldn't fit everyone's viewpoints into one book of reasonable size. Therefore, with some of the show castings (especially for Bran's line) it is a pretty solid bet that they'll be delving into ADWD quite a bit this season.
That would mean that the show will almost certainly pass the show in some POV storylines.
There hasn't been much in the news about any Greyjoy castings, so some of that might be pushed to season 5, but at some point it definitely appears that the show is going to take the lead. I'm hoping they've cast the Greyjoy uncles but just kept it under tight wraps.