I wasn't arguing with your analysis of the differences between asking different people different questions and asking everyone the same questions but then holding different people to different standards. I was only arguing that "discriminating against a group", taken literally, is equivalent to "balancing its overwhelming predominance in a particular field", taken literally. That is, I was arguing with that sentence, without assuming that these two names for what I claim are the same general thing are also names for two different discrimination methods (which are two different specific things as you pointed out.)

Regarding "intent, technique and impact" - I agree on technique and impact, intent is a thornier issue; certainly nobody ever instituted discrimination for reasons they proclaimed evil, it's always done in the name of "righting wrongs," and then real intent as opposed to proclaimed intent is very hard to establish. From my own point of view, at the gut level, some discriminators seem to act much more maliciously than others, but I'm not sure there's always a reasonable argument to support my gut feeling.