I have an iPad 1 5.0.1, jailbroken. It's a lot slower than when I had iOS 4.3.3. I was planning on downgrading, but I can't live without notifications, tabbed browsing and wi-fi sync anymore. So that should be only a desperate measure.
I tried reseting all setings, my iPad 1 got faster, but not near iOS 4.3.3. If I reset all data and settings, could it get better? Does doing that have any difference compared to completely reinstalling iOS 5.0.1 from scratch?