I saw the planters-salted-caramel-peanuts-presentation-commercial ...

[Moonwalk]

33. That's how I read it. The idea seems to be that the saltiness in the peanuts makes the woman bold...

...and salty to the negative demanding guy. And yes, thanks to profiling, we naturally assume that the put-together guy complaining of the sound is probably rude to at least the nerd guy. So we get the feeling that the woman, on eating the nuts, has decided that enough is enough. They've been up all night thanks to demanding guy, and it's time to do to him what he does to others. Be salty. But the sweetness of the nuts makes her sweet to the nerd guy who (again, profiling makes us think this) probably has been doing much of the work, unthanked and unappreciated. Yes, it can be read as flirting to get the nerd on her side, but I rather think the nerd is already on her side if she's sniping at the demanding guy. She doesn't have to be sweet. She could be bossy to him as well, and that's what the nerd seems to expect.

Instead, she's sweet, complimentary. So, she empowers herself, and then she passes that on to the nerd, empowering him. Overall, I rather liked it. But, yes, it does rely on us boxing the two men into stereotypes.