Hey, since I'm a new Brooklyn-ite, that means I'm also new to the über-hipster scene here. I live dangerously close to hipster ground zero (aka Williamsburg) and it astonishes me how little effort it takes to make 'uniqueness' so homogenized.
If you've never been to Williamsburg or another hipster-hot-bed, you might think that THERE'S NO WAY THAT EVERYONE IS DRESSING LIKE THAT. I guarantee you: You're right. Not EVERYONE is. Just the white people are.
THIS SITE pretty much nailed it.