Well, Nick, I am actually glad you are a bit defensive, because women have been on the defense for quite some time now. I'd wager centuries. 

My charge of sexism is about the overt (the diminutive "saucetress" in comparison to the descriptors for the male counterpart in this article) and inherent sexism that comes from that diminutive. And it stands. This is sexist. Is it a "little" sexist or "very" sexist? Who cares about the degree of sexism. It. Is. Sexist.

If this review had stuck to talking about the food and hadn't minimized the female working owner of Red Sauce in deference to one of the male owners of Pizza Jerk, this wouldn't be an issue. Instead, the writer made a rhetorical decision and it was a sexist one. 

And if you think "mistress" is "equivalent" to "master" in terms of what words actually mean, you clearly don't understand what "diminutive" means. Also: Ms. Magazine is not named the shortening of "Mistress." I promise. They are reclaiming "Ms." on its own terms.