Soooo, just come out of the Jensen Meet and Greet with him and Danneel and as no NDA's were requested I feel its ok to answer the Winchesters/Zeppelin question straight from the horses mouth!
Apparently it DOES cost a LOT of money even to be considered by the band so Jensen confirmed that he didn't take a salary for that episode, they took money from some of the other production costs and higher up the food chain and then asked nicely!
He also confirmed that the band only agree to usage for brands that they respect so obviously The Winchesters got the seal of approval.
Mind you, as Jensen said, he'd like to think his son's name didn't hinder their cause!!!
Drawing I did today of Danneel and Jensen, inspired by a wonderful picture taken on CR6!! These two are always looking majestic, I swear. (photo: https://pbs.twimg.com/media/Fq-sQ0RX0AEu2vS?format=jpg&name=small)
That's actually hilarious. He doesn't need to say it because it's just clear how much he genuinely loves, respects and admires Misha. Actions speak louder than words.
Besides, it counts more how you talk about someone when they're not around than to their face, and if you're comfortable enough with someone to constantly joke with them and you both have that 100% comfortable and happy aura while doing it, it just means that you're very close to that person. Like, you would never jokingly insult a friend that you're not really close with because they may get offended, but you could even safely call your best friend stupid because you're both close enough to know you would never mean it literally, but only affectionately or as an inside joke.
That said, he speaks too. When Jensen was at the Con Crossroads 6 in Brighton last March with Daneel, they both couldn't stop talking about Misha during their panel (and Misha wasn't even present at that Con), like literally nobody even asked about Misha, but they both kept bringing him up in their replies, praising him for his charity work with Random Acts and talking about him (and Cas).
There are definitely hundreds of other examples I could bring but this is just one of the most recent ones that i can think of.
Like at the Jib11 Jensen said that "Daneel refers to Misha as her boyfriend", and then he added, "which is funny cause so do I" and then he genuinely laughed in a super sweet way (it was in one of his panels, i don't remember which one, you can see it on YouTube).