Bakken crude is maintaining its $5.00 premium over WTI
It was in the plus column the entire month of September. Combination of $20 brent to WTI spread and the new rail facilities in the bakken, allows producers to arbitrage vs. Brent. I read recently that this would be expected for at least the rest of 2012.
Or more appropriately a $15 discount to Brent which it is now being priced against for delivery to the coasts.