Question for Business Travelers: Does Being a Well-Dressed Flier Get You More Perks?

I stumbled upon USA Today's article "Fly Guy: Do well-dressed fliers get more perks?" and it posed an interesting question, is it worth it to be dressed to impress while traveling by air?
Usually when taking a flight , I wear a business suit in order to cut down on luggage weight. When I've taken economy class, only once have I been bumped up to business class. I'd like to pose the question to other travelers - what are your experiences with dressing up (or down) for flights?

Photo credit: USA Today