They've always been the same price as for the cash packages people can buy through DRC.
DVC members have not had to pay peak prices, and do not have to buy tickets to add on a Dining Plan (like the cash package guests do).
Now that DVC members are allowed to segment their reservations, they do not have to buy the plan for every night of their stay (like the cash package guests do).
DVC members do have to buy the plan for every person over the age of 3 that is listed on the reservation (as do cash package guests).
I haven't seen actual prices for 2012 yet, but I believe they have been published. Maybe someone else will post with the 2012 prices.