I haven't seen the episode yet but I have a feeling that I'm going to dislike him to the degree of S1 (or hate him like in Playthings, were I though he was so selfish asking Dean to kill him when he knew what he meant to his brother)... Though I've read a pretty interesting post from the Sam's side:

http://snagging.livejournal.com/25639.html

(Though it's wrong that Dean never asked his brother what was going on... He did it right in 4x01 and Sam lied)