First: the point of my question was not my personal preference for the traditional AC system -- which is a preference, albeit one I can explain rationally, as others have done. You'll note I didn't say, as Tweet did, that my preference is "clearly better," only that I believe it makes more sense for old school D&D, where there is no unified mechanic and where "lower is better" is not an anomalous concept restricted only to armor class. My only point was that, generally speaking, when I champion my preferences, I get hit with the much-dreaded "fundamentalist" label, whereas when Tweet does even more than that, he's speaking truth. That's what bugs me, not that someone dared to say they prefer something I do not.
Second: for a topic that's supposedly so inconsequential, it sure does generate a lot of commentary. I'm not the least bit surprised, but then I think the choice of armor class system is more than just a question of mathematical pedagogy or even adherence to or dissent from tradition. Go figure.