Sssh, Dean hadn't met Loki. He remained blissfully ignorant of the presence of gods on the island, so far.

See how long that would last.

"Overall...? Being in the future isn't all that different from the past, I guess. Everything is faster, though. I'm staying with this guy called, well, Guy. Met him at that bar with the band that has really bad hygiene."

Just let him go on believing that one.