AS Movies always seems to be a tough ressie to get, even during the slowest seasons. When promotional rates for AS come out, Movies is sometimes at a higher rate. Face it, WDW would not even have considered building another 5000 units in Pop Century unless AllStars was doing *really* well.
Although the current deluxe resorts seem to be doing all right, I suspect that none of them even come close to being full during slow seasons. And there don't seem to be any new deluxe resorts coming soon. Value and DVC resorts are where the action is right now.