Earlier quoted context omitted.
Those aren't anything like the sort of questions involved in IQ tests. IQ tests rarely involve words at all, usually a series of geometric shapes where you're supposed to pick the next one.
Not in 1971 when the lawsuit was filed. Now they use picture-based tests because those are supposedly less dependent on learned knowledge. (Though I find that many Raven's progressive matrices-type questions are a lot easier if you know about symmetry groups and XOR.)
Yes, at that point people who have already developed certain mindware have an advantage, but arguably that's the point of an IQ test. You're not testing the potential of a person to eventually be really smart, you're testing for the current problem-solving potential.