I don't think verification status has anything to do with it. The way I understand it, Gox is in some kind of bureaucratic limbo with Dwolla right now. Because of this they are trying to avoid keeping any significant funds at Dwolla in case they just arbitrarily decide to shut down Gox's account and lock up whatever money they have there. So, Gox is keeping just enough money there to cover their immediate need for withdrawals. Since it takes time to transfer money to Dwolla, this means that everybody's withdrawals are delayed by approximately that amount of time (which appears to be something like 12 days from my experience over the last couple months).