The performance on my iPad 3 also deteriorated, after I updated. I don't seem to experience it anymore, so I may support the theory that it's Spotlight re-index

The performance on my iPad 3 also deteriorated, after I updated. I don't seem to experience it anymore, so I may support the theory that it's Spotlight re-indexing my device after updating. Tweetbot crashes like mad, though, but it was designed for iOS 5-6 anyway.