UI animations have a lot to do with it, but I&#x27;m more referring to UI jank over simple stuff like &#x27;enumerating a list of sharing targets&#x27; or &#x27;swiping to the next page of the launchboard&#x27; when the phone is otherwise idle. Or, my favorites: the multi-second pause from unlocking my phone during a phone&#x2F;skype call, or the taking of an <i>actual</i> eternity just to answer said fucking Skype call, of which half the time the call has already hung up once my phone is finally responding...