Only if you wait 5-10 minutes before turning it off.
Yes, I've been doing that.
My PC is on in the morning for about two hours at home, then off until I arrive at work, on for 8 hours, then off until I arrive at home, then on again for 2-4 hours.
I figured I could be losing up to 70 mins. of work every day, so I've been resetting it at some point in the last half hour before I turn it off.
:-)