Generous, loud, and least tidy I can believe, but worst dressed? no way... 
Everyone knows that its because the rest of the word are still stuck in the '80s. If your not wearing a 'members only' jacket or acid washed jeans your not in style outside of the US.
I am the happiest in a clean, plain white (or plain black) T-shirt and jeans or shorts. I've never understood why some folks get narcissistic about fashion to the point of madness. If getting stressed over other people's style of dress get's you bent of shape, I'm glad to contribute. I lose no sleep over it. Although, I will never wear flip flops, except on the beach. Wearing them in Metro Detroit means only one thing in the end, you're lazy.
Tell me about it. I don't 'dress up' for anything. Plain shirt, jeans, and my five year old work boots that are falling apart. Iv been to places where people that would stair at me like I was some kind of hobo. I just look at them and say ''you have a problem?'' I will never pay more then $20 for a pair of paints, $10 for for a shirt, and never more then $100 for my boots. Anything more is just a waste of money IMO.
And my flip flops are for the house or if I'm just going outside, but I'm 'country' so bare footed is just as good.