I recently updated to iOS4 from 3.1.3 and i did a fresh restore since i was already jailbroken on the 3.1.3. But one thing i noticed is that iOS4 is pretty slow compared to iOS3. I mean for example once its locked if slide it to unlock and after i enter the passcode it takes a while like 1 or 2 seconds to unlock it while as iOS3 it was instantaneous. And i noticed that there was a lag while browsing the videos in it. I do have a lot of videos but iOS3 didnt lag it was smooth. iOS4 well it froze will scrolling i had to return to home and come back. And ibooks well its pretty much the same. Is this a isolated incident or is it a general issue?