"Black historically perform worse than whites on standardized tests." Point being? The minorities were given the same preparation materials and the same time to study as those that passed the exam. Why were the whites denied the promotion because they passed? Such bullshit.
That's not entirely accurate. Part of the basis for affirmative action policies is that standardized testing doesn't accurately measure the ability to perform well in a certain capacity. This is necessarily connected to the fact that inequivalent access to resources (whites have schools that can coordinate standardized testing preparation better, more widespread Internet access, more educated parents, etc.), doesn't grant races equality of opportunity in such matters. Ultimately, it's possible that exposure to a similar environment (in a university, for instance), would compensate for these preconceived differences and make the minority individual no less capable.
I think it'd be closer to the truth to say that it's necessary to attack the validity of standardized testing because standardized testing doesn't tell our egalitarian culture what it wants to hear.
I'm going to give you some results of the 2005 National Assessment of Educational Progress (NAEP) 12th grade Math test taken by public schools nationally to illustrate something. The NAEP uses a "scientific" sampling approach so you can estimate what would happen with the general 12th grade national public school population(s).
As you'd expect, students who are eligible for the school lunch program (i.e., low income) and whose parents' educational attainment level was "high school" scored a lot lower, overall, than students who were not eligible for the school lunch program (middle to upper income) and whose parents' educational attainment level was "Graduated College." The defined "disadvantaged" students averaged 129 and the defined "advantaged" students cored 163; a 34 point difference.
Yet White students in the defined "disadvantaged group" scored slighly higher on average, at 137, than Black students in the "advantaged" group did (134). Turn it around and you find that White students in the "advantaged" group scored 50 points higher (166 to 116) than Black students in the "disadvantaged " group did.
The point is that measurable environmental factors cannot account for the difference between Black and White standardized test scores. I realize that there's been a lot of effort to explain that away. The "stereotype challenge" thing is an example. But I really don't think they are sufficient to explain away numbers like I referenced above.
The problem is that the egalitarian dogma holds that, if only all unfairness were to go away, proportions of individuals of difference races, sexes, etc., in given positions would be reasonably in line with proportions made of of those groups in the general population. That is a completely unsubstantiated assumption.
Congratulations. Within ten minutes of my waking up, you have demonstrated that some people are so stupid you shouldn't even bother 
