It looks good -- I've always preferred the "membrane"-style buttons to the aqua buttons, and the "aluplinum" theme looks good so far. I like the fact that Mail will sport a single window, instead of a window and a drawer.
Soulseek: AppleInsider never called the new look a "platinum theme." Nor did they say that it was definitely platinum, and not aluminum or silver. They simply said that it sports a "platinum gradient," but never calls the new looks specifically "platinum." In fact, they don't call it anything except "the new look":
"An apparent blending of two themes, the new look lifts interface elements from both of the company's existing themes and embeds them inside a sleek platinum gradient."
Let's all make sure we actually read the story before we start name-calling, getting upset and getting in a tiffy about what it's called. The point isn't what the hell the theme most resembles, nor is it about what it's called, nor is it meant to start a war between the aluminum people and platinum people. As far as I'm concerned (and the story, as well), there isn't a name for it at all, and if you prefer platinum to aluminum, by golly, that's your right. No need to bash people who insist on calling it aluminum -- you know what they're talking about when they refer to "the new aluminum" theme, and no amount of yelling at them or getting upset at them is going to make them adopt your name for it, nor should it even matter.
Sheesh.