I withdrew on November 23, 2013 and have yet to receive my payment as of today. I have never had a problem with withdrawing in the past and usually receive my payments within a couple days.
If you read their frequently asked questions it says:
How long does it take for withdrawals to be processed?
Withdrawals are being processed manually and payments are sent once a week in order to minimize transaction fees.
I'd give it a little more time and see if it comes through.