Seems to be legit. Some (not all) of the latency is alleviated. Gets better as it gets used so it’s possible a caching or memory issue with the initial consumer release of iOS 8 could have been the culprit.
For the record, I did not have any latency, caching or memory issues in any beta of iOS 8 across the 4 devices (iPads, iPhones) I tested.
This release is not as snappy as the GM I was working with last week, but better than official consumer release I just updated.
8.0.2 is MobileGuru-Approved.