I don't have to shake or flick my Ultra. I get the notification as soon as I nudge it or just pick it up. Have to nudge it about an inch before it comes on and just picking it up a few inches gets the notifier. Just reached over and picked it up now and there it was.
Yeah, it seems as long as there is any motion, it displays a notifier. That's a nice feature. I thought it would be a waste, but it's very useful.