Oh, will re-post my reply on Tunicgate. Should stress, as someone else remarked above, that style does not necessarily equal fashion. Now that starts arguments ... !
Previous post:
p.15 - Hully's question: Can one be "fashionable" and enjoy clothes WITHOUT sneering at those that don't?
I love this question! I used to work in fashion (yes, I'm now fat and probably 'mumsy'.)
Whilst wearing fashion that was so cutting-edge it hadn't even made it into 'fashion' yet, I did not judge those who hadn't a clue why I was wearing what I wore ... and, as a genuine fashion maven, would judge their style on whether it worked for the wearer personally, in their personal context. You know those street style snapshots all the fashion mags do? They're not interested in whether the wearer has correctly interpreted the season's design vernacular; they're celebrating individuals' joyous personal style.
There is, on the other hand, a sizeable layer of fashion aficionados who judge everybody else. These people spend lots of money each season, on clothes & accessories that mark them out as 'fashionable' to other people like themselves. Hilariously, those people would judge my looks most adversely because they were too sheep-like to realise they'd be spending all of next season's wages on watered-down versions of what I was in. And they were BORING so I judged them 
They believe there's a right and a wrong to style and they believe they have special access to the rules. They are mistaken.
I still judge people like that, btw ...