It's really time users running iOS 6, update to iOS 7.
What for? To slow down the iPad 2 that we bought for my in-laws and that used to work fine?
I have always been an iOS early adopter, but even with my iPad 3 and iPhone 4S, I am regretting very much that I updated. Lots of little things that are broken by design, such as stopping a timer or alarm with a tap instead of a swipe (try tapping with your little finger when using the iPhone as a cooking timer). Different for the purpose of being different, not for being better.
My main "proof" that iOS 7 is less intuitive than iOS 6 is the fact that my daughter could use the iOS 6 iPad when she was one year old (I have videos to prove it). She could unlock the device, scroll to the page with her favorite app and launch it. Now as a 2-year-old, she can't use the iOS 7 iPad anymore without help. Now she can't unlock the iPad anymore, and when she scrolls, half the time the notification and control center keep coming up (yes, I know, I can disable them, but then iOS 7 becomes practically obsolete, except for the new design and slower performance). But anyway, that is a discussion that has happened here many times. I am just quite sick of the elitists who act like there is no reason not to upgrade. As I see it, the best argument right now for an upgrade is a bugfix to Facetime, and that is a rather stupid argument for an OS update.
For an iPad 2, iOS 6 is the best OS. Period. Deal with it. I remember well how iOS 5 practically killed my first gen iPad, and I refuse to go through the same BS again.