That used to happen here in NY, but Mystro is running faster when it comes on loading the TV guide or settings.I think that TWC is improving Mystro.
The only thing that is REALLY annoying is when you press the "List" button to see your shows on your DVR.It takes really long to load all the DVR list.
You can leave to the kitchen to make a tea and when you are back that list will still loading :P