I think we have to consider the source on this and not get too surprised at the results. Of course brands with identifiable logos/names would be chosen in a general survey. I'm not surprised at all that Gucci, LV, etc. top the lists in most areas, even though most of us here finds these brands a little blagh. Certainly, if they asked people who worked in fashion or who knew a lot about the industry or followed trends, it would be a very different list. Probably 99.99% of those people surveyed have never even heard of most of the brands we would covet. Say "Yohji Yamamoto" to them and they'll probably think he makes motorcycles and "Alexander McQueen" is perhaps Steve's nephew.
It's sort of like how if you ask book editors what are the most coveted novels, Ulysses might make it to the top. A general survey, though, would probably pick Stephen King or Anne Rice or something that would make most book people cringe. Likewise, ask 25,000 people the best movie ever and "Ferris Bueller" might be high on the list, even though critics might pick "Citizen Kane" or "8 1/2."