Back in the Giulia
AO Silver Member
Join Date: Jun 2007
Location: United Kingdom
County: Greater Manchester
The backup doesn't need to backup most of the files such as pictures, apps and videos from the old phone as most should already be in iTunes. The backup only takes a few minutes as it's only really backing up the configuration and settings in the apps and is thus pretty quick.
A restore does two things:
1) Restores the configuration which only takes a few minutes
2) Syncs which puts back all the files from iTunes
Getting the pictures, apps and videos back from the sync takes the time and most of these aren't included in the backup.