I keep reading "do a DFU restore" if you want to restore back to stock firmware. What is the difference between DFU Restore and just pushing restore in iTunes? Does DFU restore wipe out the phone better then regular restore? Last night I restored my 1st gen iPhone via iTunes restore buttons because opening the apps were laggy w/ jailbroken 2.1. Now on stock 2.1 the SMS app is still a bit laggy. If I would have DFU restored instead of "regular' restore, would that have made a difference?