The Washington Post will allow singular ‘they’:
On Wednesday, The New York Times included a new honorific — Mx. — in a story that quoted Senia Hardwick, a bookshop employee who didn’t want to be assigned a gender by the newspaper. It was a big step for the Times, which still hasn’t settled on a definitive style for the pronoun, Kara Bloomgarden-Smoke wrote in the New York Observer:
Asked about the use of Mx. (pronounced “mix”) in the Times back in June, standards editor Philip B. Corbett seemed to be taking a wait and see approach to the word. “I don’t think we’re likely to adopt Mx. in the near future,” Mr. Corbett told the Times. “It remains too unfamiliar to most people, and it’s not clear when or if it will emerge as a widely adopted term.”
