I disagree. I think she’s learned to speak to large groups without raising her voice in the matter in which she was previously derided for being ‘shrill’. She comes across as more authoritative by not raising her voice, at the same time that she conveys a ‘just you and me’ one-of-us-ism.
Her delivery is masterful, and always includes light moments, jokes, and zingers. I loved how she razzed the Bushes and Rove, and of course Obama.
She still sounds shrill. I just don’t like the quirky stuff.