There's always an uptick in mainstream fashion's interest in vintage when MadMen is airing. When season 4 starts, there will be lots of articles about how to get the look. With each passing season, it's drifting more and more into the common awareness. It's now not uncommon to find shirtdresses and full skirted dresses at Target and Walmart. But fashion is somewhat slow to change, despite how quickly fads come and go.