adapted very slowly to any real evidence of feminine achievement

I’d appreciate some elaboration on the part in bold:

Hutton had to modify some of these views when George Eliot appeared on the scene, and he might have modified
them sooner if he had understood Jane Eyre, Villette, or Wuthering Heights. But literary stereotypes adapted very
slowly to any real evidence of feminine achievement. If we break down the categories that are the staple of Victorian periodical reviewing, we find that women writers were acknowledged to possess sentiment, refinement, tact, observation, domestic expertise, high moral tone, and knowledge of female character; and thought to lack originality, intellectual training, abstract intelligence, humor, self-control, and knowledge of male character.

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