OS X has the same shake animation on failed login. It's horrendous because there is a non deterministic delay before it shows. If I glance away from the screen

OS X has the same shake animation on failed login. It's horrendous because there is a non deterministic delay before it shows. If I glance away from the screen and miss the animation I have no idea that the login has failed. It also doesn't differentiate between different failure modes. I've had my company's active directory stop working, but I don't know this because the feedback is exactly the same as if I'd mistyped my complex password. As a rule: a failed login is the wrong time to try and delight me with a beautiful UI.