Alan Taylor in his interview with Variety:
"I think there was some effort to fudge the timeline a little bit by not declaring exactly how long we were there. I think that worked for some people, for other people it didn’t."
If you ever venture over to r/ASOIAF, you'll find that the biggest complaint this season (for every episode) is the fact that characters seem to teleport. 'Oh a jouney that took a few epsidoes in season one? Five minutes to send a raven, another five for the dragon to fly there.'
As much as I'm ejoying this season, AV Club's headline says it best: 'Game Of Thrones director admits the show’s timeline is “straining plausibility”'.