I'm one of those praying for fall, since it was +100 here yesterday! But yeah, it gets frustrating. Like joy, I grew up in the Midwest which doesn't cool down at night in the summers, and it wasn't until I moved to the west coast that I understood why denim jackets existed. In my world, if it was cold enough for a jacket, you needed one a lot warmer than that.
A lot of bloggers are as bad about this as the fashion magazines - I remember the shots of people in town for spring NYFW last year when it was still mega-winter temps and a foot of snow on the ground and they were wearing little dresses and opentoed shoes. Ridiculous.
I do think the status thing holds weight - if you go from place to car and never have to suffer through a frigid Uninsulated office or a house without air conditioning or walk any instance or take transit, you really can be seasonally inappropriate, assuming you're willing to suffer, and are healthy enough to do so. I guess i don't find that that interesting, because for me dressing is about the combination f aesthetics and practicality. Fashion mags and catalogs are like sculptures, whereas WIWs are like a chair - a sculpture just has to be beautiful or striking while a chair can be both pretty and useful.