I'm pretty sure male genitals getting cut off is normally called "neutering" or somehting to that effect, and the end product tends to go by the name "eunuch". Who, so far as I know, are not exactly considered women, but males no longer able to fuilfill their reproductive function.

Well, that's what the poll question is. Taken at face value, the answer to that is without doubt that such people would still be considered "male".

Actual gender modification is AFAIK rather more complicated both as a medical operation and as a question. And you know, I kind of dislike muddily worded and ill-defined questions particularly over complex issues...