It's destroyed my iPad 2. General usage is a bit jerky but when it comes to entering ANY kind of text, even the unlock code, it takes multiple seconds for any input to be registered. I've had it time out on the lock screen when I try and unlock it and trying to type any email, message, web address etc is impossible.
I foresee an interesting visit to an Apple store very soon.
Sounds a lot like the performance of iOS 4 on the iPhone 3G. Let us know how it goes.
