I love that Cas coming back was not just "a win" for Dean, but was in fact "a pretty damn big win". It continues this trend of Dean not even realising what he's said when it comes to Cas... i.e. "handsome" vs. "devastatingly handsome", "I just need a damn win" vs. "I said I needed a big win", etc. I'm sure there are a ton more, but my main point is that Dean keeps adding amplifying words to his statements when it comes to Cas. And he has yet to catch himself doing it.
“I said I needed a big win. We got Cas back. That’s a pretty damn big win.”
(I still can’t get over the fact that Dean opened the closet doors to begin that whole conversation, and then after Sam’s “fair enough,” SAM was the one who closed the closet doors on that whole convo. I mean... REALLY, SHOW?!)
Heck, even their conversation in the car touches on this in small ways, from Dean taking off the touristy hat band from Cas’s hat to make it look better, to Cas asking if Dean meant the town of Tombstone but Dean clarifies he meant the MOVIE and then reminds Cas about watching it... and mentions Kurt Russel (which was the alias Dean used in this scene), and Cas replies with a line from that movie which was both said BY THE ACTOR Cas was using as an alias, but the line ALSO worked as an answer to Dean on about four different levels... I’M YOUR HUCKLEBERRY with the put-on accent and even growlier voice than usual, proving he understood the reference, was ready to play his role, would follow Dean’s lead... And then Dean was so pleased by all of this he couldn’t resist blurting out an “It’s good to have you back, Cas,” with the little hitch in his voice. I mean, EVERYTHING about this is brilliant.
It might not be a full clarification, but HECK THEY ARE GETTING CLOSER AND CLOSER TO BEING ON THE SAME PAGE HERE.