How long does it take roughly "restoring in itunes. Please wait..."

Hi All - Quick question - I seem to have got through the majority of the process - I’m currently in “Pestoring in iTunes. Please wait while script is running…” , but its said that for just over a hour…?.. how long should it normally take?

Cheers Ade

Sorry that’s meant to say "Restoring in iTunes… not Pestoring…lol