Actually, that specific denial is limited to two items: gender based discrimination by Tom Preston-Werner and his wife, and the existence of a discriminatory/hostile workspace. Not coincidentally, these are the two claims which would have been against the law, and also the least of the claims brought forth by Horvath (though it's the angle latched onto by the media) - she instead claimed personal harassment from Horvath's wife, and the non-responsiveness of HR to these issues.

The only real gender based problems she had were related to male co-worker's responses to female co-workers hula-hooping, as I remember it.

There wouldn't be much evidence of personal harassment, particularly the kind described by Horvath.