Ok, so when I put my new iMac 21" to sleep for several hours it seems to lag when waking up. I have the maxed out 21" iMac with the 1TB fushion drive. I have it set that after 4 hours to prompt for a password. This is exactly what happens: Computer is in sleep mode for several hours. I go ahead and wake it up and the password screen comes up. I go to type in my password and a gray screen then pops up for at least 30-40 seconds. I wait, then the password screen comes back. Is this normal? I used time machine to transer over all my apps and data, but not settings. I also changed the login background. My 2010 MBP didn't do this, but it wasn't running Mountain Lion.