Not necessarily...it depends on when you go and where you stay...
Here's my real-world example:
I bought 100 points at AKV in 2008, receiving all 2008 points. That means I received 49 years worth of points (4900 points total, assuming for now that I plan to keep the contract until it expires) and I paid a total of $9200, or roughly $1.88/point. This was paid in cash and not financed.
Last week, I stayed in a value studio at AKV for 5 nights at a "cost" of 45 points. These were all 2017 points and the maintenance fees on those points were $6.59/pt. So, my stay "cost" $381.15, or $76.23 per night. If you were able to score a room anywhere on property for less than $80/night, I'd like to hear about it. Even if you argue that you could rent for that, I would again challenge anyone to find an owner willing to rent for less than $9/point.
In reality, I chose to buy DVC because I like the "vacation home" concept. I like having a kitchen, washing machine and jacuzzi tub in my villa. We have two daughters who were 3 and 5 when we bought. We enjoyed having them sleep in a different room so that we could stay up and watch TV without disturbing them. The laundry facilities in the room made it easy to pack light and not have to worry about spills and accidents. Now that the girls are teens, I really love the flexibility that DVC offers. Next year, I have 55 points that were banked and need to be used. DH has no desire to go on another Disney vacation (he just went last fall and he really only can handle one trip every 3-4 years) so it will be just the girls and I next fall. Even though I definitely prefer the 1BR, the girls understand that we will either stay in a studio, or they won't go.
To the OP, here's how I've made it work so far. We own 100 points at AKV and 50 points at HHI. Basically, I bank and borrow my AKV points and go to WDW two years in a row, using approximately 150 points each time, generally staying in a 1BR for 5 nights. In the "off" year, we use banking and borrowing of our HHI points and go there for Spring Break for 5 nights in a 1BR. I think we are a little backwards, though. As our kids have gotten older, I am more inclined to stay in the studios. When they were younger, I really wanted the 1BR, but now, I'd rather stay in the studio and go more often instead of staying in a 1BR and going less frequently.
Does it save me money? No, but it beats staying in a value resort and I don't have to hunt for bargains. The ticket discounts are great, but not guaranteed. The Tables In Wonderland has also saved us quite a bit since we really enjoy table-service dining. I would advise not looking at DVC as a financial savings, although it can save you money in certain circumstances, but rather as a way to upgrade your vacation for not much more than you'd pay for a moderate. Don't count on the benefits if you consider a purchase, but you can certainly keep them in mind. They are always subject to change, but I think that there will always be some sort of benefits that are exclusive to DVC members.