Sam sure did turn into a fast dog, didn't he? I mean he left well after Sookie did...she was driving a car...yet he arrived around the same time she did at Bill's house. Maybe there was a shortcut through the swamp.
Eric has developed into a pretty intimidating character. When we first saw him on the throne in the bar, I took him as yet another wimpy Emo, angst-ridden "youth" but he's actually a big physical guy (bigger than Bill at least). I read some of his backstory, and so as to avoid spoilers, I'll just say that they cast his role well.
I agree with the fey vampire, Jason's new girlfriend is a psychopath. A beautiful, comely, and extremely alluring psychopath.