Lol, Laura. You go, girl. Tell it like it is!
The human being is such a visual creature. By contrast, presumably, dogs don't *know* until they can go up and smell something. Humans, we feel assured when we see. We say "see you later"; we don't say "smell you later." (Although there's that commercial that says no none tells you to *stop and see the roses*... which I think is an astute comment in light of evolutionary biology.)
Anyways. Sometimes, like in primary school, very small differences in the way a uniform is worn can speak volumes - as torontogirl spoke of. But that's within a small community. I don't know that those tells tell in a broader community.
I also wonder about how much sartorial uniformity is required to be a functioning member of society at large. My salt-of-the-earth mother, who is a power house as well as a pillar, suggests I try a new hobby all the time. Frankly, I'd dress a lot crazier if I didn't also enjoy being bossy to a certain extent. People who step out of line are a sore thumb.