My guess is we are looking at bug fixes, does it not drive anyone else nuts when you go to the phone or contacts app and it is locked for a few seconds before you can scroll around???
Yes, that is called loading. What that really is, is just an image. Some apps (safari, contacts, notes) save a screenshot on exit and use that as the default loading image on the next start up. It is suposed to provide a more clean feel. But being an image you can't really expect it to work, until the real UI loads.