Ha, yes they have indeed aged. The two main guys look like babies when you go back to the first season, being in their early twenties, now they look like men. Still handsome...actually, they were very cute to begin with and now they're handsome :) The most recurring female character, Kim Rhodes, hilarious chic--she was asked about her hair and said, "Well, I was thinking what would be the best color to express a big fuck you to the shallow Hollywood stereotype and it hit me- Grey! Let the shit go grey!" hahaha! And her sidekick female co star is a beautiful woman, who is alll woman. She's got some serious thighs and bum, and expressed that a part in Supernatural where she could be proudly bigger boned was a dream job, because she sure the fuck wasn't giving up on her love-food. LOL And yes, the swearing was all them. They swear a lot, which is hilarious since it's a prime time show so there's not much swearing in it.
At the Saturday night special, which features their own homegrown band Louden Swain, (the lead singer being a member of the cast, the rest of the band simply friends of people on the show), most of the cast was backstage getting shitfaced, and one of the guys stumbled on stage with a beer then had an "Oops" moment before shouting "You guys don't mind, right?" When he was assured quite loudly that we didn't, he proceeded to dance down the aisles and pull people out with him. Needless to say, the security was not very tight and didn't need to be.
I was definitely in the moment these few days, not thinking about a bigger picture, just enjoying the picture I was a part of. No matter what there might be after this, the fact that we can't possibly know supports your conclusion. I've recently been thinking of it in terms of a very elaborate story based live action video game, one that we chose to play, and one of the features is that we have no past or future, in big and small ways. And if that's the case, then eat, drink, and be merry :)