Ok so far I have been waiting for 16 hours after using the confirmation email. Withdrawal is waiting for approval. 0.6 btc. the sum is small and there is no red flag or anything wrong it seems. It has happened before.  I use mainly Bittrex, cryptopia and bitstamp for this reason. I would like to trade more on Poloniex but my own experience and the comments from other users prevent me from doing so. Of course I would be happy if they can manage to do it in 24 hours but if one does need the funds quickly somewhere else than poloniex wouldn't be my first choice. Apart of that I have never had a problem with Poloniex  and will keep using them when I am not in a great hurry for withdrawals.