∞ 39 Points of a Blogging Style Guide
A great read of Robert Heaton's blogging style guide. Calling out the 19th point:
"They" is a great word for referring to an unspecified person of an unspecified gender.
100% agree. It's not only the right word, but also much easier since you don't have to even think about the word choice. I also find myself starting to use They more often even if I know the person's gender.