What's up with the lag when moving tasks around (they become fuzzy)?

When I move a task to a calendar, or even move them around in the prioritize box, they become fuzzy for a moment, then become clear. I figure this is because you're making some XHR request in the background and want it to confirm, but can't you just assume it will complete, and make the UI look snappy instead of making it feel like it lags whenever I try to do something? 

Then, in the off-chance it fails, you move it back or make it red or something.