If brain mass was important then we'd be learning from blue whales rather than eating them.

It really doesn't matter if this or that group is statistically better at this or that function. What matters is what the individual does.

Thus, if a cripple veteran black female lesbian senior citizen enrolls as a freshman majoring in math, let her determine her fate against the same standard as everybody else who takes the classes and majors in that curriculum. If she's good, she'll kick one-legged ass. If she's not, she wont. It's up to her to find her limits, not for society to determine her limits for her.