you're trying to use extreme examples.
i'm talking about just dressing comfortably. maybe business casual.
when i do interviews, i'm shirt, dress pants, tie, and i carry a jacket. plus i'm in great shape. i do fine. i could also dress in business casual, and since i'm in great shape - that alone sends a good positive image. rather than a fat slob wearing a polo shirt.
unfortuantely, we value physical appearance over intelligence in the cubicile warrior world. it's sad, but for monkey work positions - i guess you could use that as a differentiator.
for my entertainment company - i don't want a office monkey. if the guy comes in wearing jeans, and blows me away with his passion and intelligence and warm personality - i hire him.
assuming he doesn't come in wearing flip flops and wife beater lol!
r