I will be receiving my 2012 27" iMac (with Fusion Drive) on Thursday so I am trying to get my ducks in a row now. I currently have a 2011 21" iMac with a 500GB HDD that is fully backed up to a Time Capsule (over Wi-Fi not LAN). The HDD is pretty full with only about 50GB of free space. I plan on restoring from my Time Machine backup when I first start up the new iMac. The question is how long should I expect this to take? How has this worked out for some of you? I have seen it posted here that someone's new iMac took 24 hours to restore! I dread the thought!