Atlantic  opens the proceedings:

Carly Fiorina stood out on the GOP debate stage last night in large part because she, well, literally stood out. The sole female candidate, the royal blue in a sea of obligatory black, handily won the debate, and that is largely because she skillfully exploited the thing that is both her biggest liability and, potentially, her biggest asset: She’s a woman.

Guardian adds on:

Fiorina has been clever in response to questions about Trump’s comments, carefully threading the needle between “playing the gender card”, as she calls it, and capitalizing on her role as the only female candidate in the Republican race.

But that’s not the most important aspect, the most important bit is covered by HuffPo here, that she wore 3.5 inch high heels through the debate.