I like this comment. The idea that animations should be able to be picked apart frame by frame and always be coherent doesn't make much sense, because the user will never actually do that.

I do like the point the article makes about using ui fidelity as a proxy for software quality, and agree that they pointed out some bad animations. But, I think you hit the nail on the head .. frame by frame coherence isn't the best yardstick for measuring animation "goodness".