I like spreadsheets and running what if senarios in them. When looking at
DVC I compared staying at various DVC resorts (7 standard rooms, AKV savanna, BLT lake and BWV preferred) in a studio vrs the rack rate from Disney at the times I travelled to see exactly what kind of a discount you were getting with DVC as compared to the discounted Disney offered.
Looking at 2 weeks, Dec 9-23 2012. The average number of points to stay in a studio was 199 points. The average rack was $7,013. If one rented points at $11/point, the saving over rack rate was 68%. Assuming real costs (buy in + MF) of $7/point that works out to a 80% discount. In both cases this is a lot more than the typical discount that Disney offers on deluxe rooms.
Looking at 3 weeks, Aug 12-Sept 02 2012. The average number of points to stay in a studio was 350 points. The average rack $8,606. If one rented points at $11/point, the saving over rack rate was 55%. Assuming real costs (buy in + MF) of $7/point that works out to a 71% discount. Certainly not as good as the Dec savings, but still better than any Disney discounts.
I also ran some other numbers for the same time periods comparing a stay a Port Orleans vrs the average for a DVC studio. In Dec the savings were 23% and 51%, while in Aug the savings were only 3% and 38%.
At the end of the day here's what it comes down to for me. I want to stay at BWV, I don't want to pay rack racks or even rack rates with a 35% discount, but I will gladly pay rack rates with an 70-80% discount to stay there. DVC lets me do this.