WOOOOO! So if there are 47 Million points sold at only 8 DVC resorts it sounds as though it would be difficult to get the dates you wanted even with an 11 month reservation.
Disney has not (could not legally) oversell the resorts. But they do sell them to be pretty much completely full year round. And, of course, certain times of year are more popular than others (and those times often surprise people - early December is a very popular DVC time).
Want to have a BLT Themepark View on New Years Eve to see the fireworks? - better own there and be booking 11 months out in the morning - you might not get that rooms if you wait until 11am Eastern Time - and your chances it will be available seven months out aren't pretty dismal. However, want a room - any room at any resort - in early February - you'll problem find availability as late as January, maybe later - it might not be the resort you'd pick if you had a choice - and a longish stay might have you moving rooms - or even resorts, but chances are something will be available.
There are a lot of points out there - but there are a lot of rooms - each taking between 8 and a few hundred points per night and 365 nights in the year.