I can confirm that neither "slow" nor "instant" withdrawal to different address than the account address and without 2FA cannot process because the confirmation email doesn't go through: I receive no confirmation email.
I have also tested "instant" withdraw with the account address, but the BTC transaction is never made and the (thankfully small) remaining funds hang in limbo.
I also have a friend trying to withdraw to his account address and with 2FA enabled via the "slow" withdrawal, but no transaction has been made yet after around ~8 hours.
The withdrawal system is busted.
RIP Freebitco.in
All is good! It went through with delay, but it finally did!
I would also like to state that my transaction finally went through! Faith ~restored!