I agree that she does not intend to insult Caroline but rather how Austen, throughout the novel, paints Caroline and her cohorts as not being taught to think for themselves as Lizzy has. I would rather say she was not taught but by her parental neglect was allowed to read and think. I was not limiting myself to this one comment. Do you think that was /nyanyaneko2's intent?

Compare Lizzy to Caroline Bingley. Lizzy can be seen as valuing herself. Caroline seems to only display her value in a narrow role capped by matrimony. I agree that Lizzy is not like other women we meet in the novel.