I think Tyrion's shit talking could have done enough without having to throw in that rather out-of-character scene, but fair enough. In the books, even when he becomes more sympathetic, Jaime seems to have his own vein of douchiness and it doesn't seem like he'd go make fun of some random bastard when he has better things to do like railing his smoking hot sister...I think they are just using Jaime as a catalyst to stress what the Night's Watch's duties have been relegated to as of late. It makes perfect sense when you consider they back that of with all of Tyrion's shit-talking.
Someone pointed out that the actor playing Robb looks like he should be playing the part of Jon, and now I can't unsee it. Damn them to hell for that!
I can't figure out whether it's the cast and/or the acting, but the Hound is a major disappointment. He looks more like a begger than anything else. He is supposed to be repulsive and vicious with an edge of insanity lingering, and the guy in the show just makes me want to give him the change in my pocket.
I actually really like the Hound; maybe they chose the wrong actor as far as looks are concerned, but I think he's got the personality. I love the way he delivered the line:
Ned: "The butcher's boy; you rode him down?"
The Hound: "He ran... not very fast."
Also, I thought the breakfast scene with Tyrion, Jaime and Cersei was great. Dinklage really nailed it in that scene.
EDIT: one of the problems with the Hound is that he has a repulsive, deformed side of his face, but I realized during the episode that they rarely reveal it to the camera.