I remember hearing that with iOS 6 if you received a notification on one device, if you have that same app on another device, and you cleared that notification there, the notification will clear from the other device.
For example, if I received a notification on my iPad saying it's my turn in Words with Friends, and I decide to play it on my iPhone (it's installed on both), the notification will clear from my iPad.
I'm bringing this up because that's not the case on my iPhone/iPad on 6.1. Was it just a rumor or am I missing a setting somewhere?
Here's a couple of links so that you all don't think I'm making this up lol
Apple Finally Fixes How Annoying Notifications Across Multiple Devices Are In iOS 6 | Cult of Mac
Here's What's New in Notifications in iOS 6