Why is it sexist? She did terrible at Yahoo. That's fact. Or you say, just because she is woman, people should say she did a good job?
What does Mayer's floundering in her post-Googler-career as Yahoo's CEO have to do with the product failures of Picasa and Finance? Referencing her in this context makes as little sense as referencing Andy Rubin -- another prominent Googler who went on to flounder as CEO.