I think the Dontos delay makes sense because Sansa was happy for most of last season thinking she'd be the new Mrs. Tyrell and free of Joffrey only to have quite a rude awakening from Tywin's plans. Now, Spoiler: Littlefinger will be away at the Eeyrie, and Sansa will be dreading the future, so she'll take any chance she gets to flee and Dontos the drunk will be the perfect "hero" for he, even if he's not the stereotypical knight she's always longed for.


As for the PW, I don't see it being the episode Martin writes. While he has taken big episodes before, I think he'll use the bulk of his episode to introduce us to Dorne, and the cast of new characters this location will bring, while delving into their history with the Lannisters and the sacking of Kings Landing (which hasn't really been touched on yet). I'm sticking with episode 4.