We have recently added a two factor authentication to withdrawals for player protection which 99% of the players do appreciate.  An email is sent to the email address on file to confirm and then between the hours of 10-10pm EST the withdrawal is often sent within minutes but up to 2 hours and after normal business hours it may take up to 4 hours.  We are testing a two factor instant withdrawal system as well with addresses that were already approved on an account.