Does it have to restore apps after install or does it archive install?

[applesith]

With iOS6, I remember installing it and then restoring all my apps and settings from iCloud. It took a very long time for all of it to download again.

My co-worker just upgraded to iOS7 and all his apps where there when his phone rebooted.

Does iOS7 "archive and install" by default? Or did his icloud backup just download very quickly?

Thanks!