I don't know why people are getting their panties in a knot over this. Most people here surely are realists in the sense that they know most of the world recognizes the PRC. At least when people fill out Internet-based forms, they are usually given the choice of Taiwan or China, and the PRC label is not often included (perhaps because it is too long and Internet language on forms strives to be succinct in most cases).
Most blue-supporting Taiwanese would have no problem with China as it does not reference the PRC or ROC--just China. Taiwan, when offered on some applications that aren't official (bank applications, job applications on Internet etc.), is definitely the preferred nomenclature but I can understand why some Internet surveys/applications etc. don't include it.
To me, not filling a survey in because it says "Province of China" seems to be pro-green fanaticism. I'm as pro-Taiwan, pro-Japan-, pro-US as they come, but I realize that most people,including software programmers, may not be fully versed in the nuances of Taiwan-China relations and terminologies as foreigners here are.