A lot of unbelievable stuff happens on Game of Thrones. The dead walk. Dragons fly. No one wears hats beyond the wall. But the penultimate episode pushed a lot of people beyond their ability to suspend their disbelief in the show's interior logic.
You may recognize some of these complaints from what you were screaming at the TV:
the reason why we get a shorter episode in this got season because they spend the whole budget to buy a faster than light raven messenger— ochie geeks (@ochie_geeks) August 23, 2017
Looking at a Westeros map, both a messenger raven and the three dragons cross almost 1000 miles verrrrrrry quickly...— Matt Baldwin 📎 (@thisbrokenwheel) August 22, 2017
The speed in which a raven flew south looking for Daenerys at Dragonstone after Gendry ran back to Eastwatch was made much of by viewers:
The episode's director Alan Taylor spoke to the New York Times about his experience at the helm of the show, and even a NYT reporter couldn't resist asking how exactly this super speed was possible:
So how fast are those ravens anyway?
I’ve only looked at one review online, and it was very much concerned with the speed of the ravens. I thought, that’s funny — you don’t seem troubled by the lizard as big as a 747, but you’re really concerned about the speed of a raven. It is true there are time issues, and I’m not exactly sure how many kilometers there are between Eastwatch and Dragonstone. But it was a bit dreary to hear somebody who said, “I cannot enjoy this episode because, you know, that speed of that raven ... ” There’s was a lot of wonderful stuff going on here and if it really gets that much in your way, that’s not good to hear. But that said, Gendry’s a really great runner. [Laughs.] Ravens go super fast. And who’s to say how much time passes on that island, since it’s always sort of an eternal twilight north of the Wall? With those three ideas in mind, I think we can lay the timing concerns to rest.
There you have it. Stop worrying about inconsistencies in the show's timeline, and just enjoy all the murder and mayhem. Taylor also worked on the show's first season, where he met George R.R. Martin, who confirmed exactly who the show is really about: Jon Snow and Daenerys. You WILL see these two together, according to what Taylor heard from Martin:
He said something: That it really is all about Dany and Jon. I was surprised because at the time, you know, I thought, well Robb Stark’s going to be king next, probably. And who knows where this story’s going? But it was absolutely clear to him that within this sprawling scale the whole story was coming down to this partnership.
At least that part has taken a really, really long time.