I felt the need to add this for the sake of the newbies.
This day by day booking you see recommended here on the Dis is really a huge factor in this. We have got people believing it is necessary to call each day starting at 11 months. Now instead of 1 call to book a ressie these people are calling for December every day. That 5 day ressie now took 5 phone calls. 5phone calls times the number of people now doing it and you can see the result.
I'll never do it and I'd like to see MS not allow it either. You want to book day by day, fine, you'll simply have to check out and back in every day of your stay. That out to eliminate this practice.