Many CDs have an elastic internal gender ID, unlike TSs and cisgenders. To persist in "he-ing" a CD when she is dressed is not being sensitive to her desire to present as a woman. Do all CDs feel this way? Likely not. We have several CDs here who have male names, and I would never refer to such CDs as "she". Using "he/she" is not a bad idea in a general sense, but it is bulky and it assumes the CD always identifies as a mixture of both internally. This is not always the case.
I'm pretty sure that most people here prefer to be referred to as a "she" (assuming for the closeted CDs that their time on this site is their girly time), and I trust that if they didn't, they'd change their user name, or find another way to tell us, such as posting something in their signatures.