actually, I agree with this so much, even though I've loved this season so far (are we seriously only THREE episodes in?) I have had a bit of a niggling annoyance with Sam's reaction (or lack thereof) to Dean's return. My sister and I have decided to believe (a.k.a 'bury our heads in the sand') that Sam is so completely broken by Dean's death that he's gone a bit mad. Hence hanging out with whoever that is who's pretending to be Ruby...