I did see that your poll was related to a GLAAD poll(and a trans documentary) that used the same language. I should have directed my post more at that language than anyone personally responding here. Sorry about that.
I do think it's telling that the language went several pages unexamined, and not of anyone's moral character, but of the fact that the idea that there are plenty of invisible trans people, and that cis shouldn't be an assumption. I disclose that I'm trans to friends because it's an important part of who I am, but I also choose to let strangers, coworkers, and other acquaintances assume that I'm cis because it makes my day-to-day easier, and at some point, my life could depend on it. Until these ideas are more thoroughly challenged, there will be a great number of trans people that choose to remain invisible.