I received a Bitcoin withdrawal recently. However, I am thinking that they're stalling on the biggest Bitcoin withdrawals and allowing the smaller ones. Some people have quite a lot of money on Poloniex,
I am pretty sure there is just lots pf jealous FUD going on.
One thing is sure, their traffic increased greatly and they could not hire and train enough stuff on time for 30-40k users online. So when form any reason some deposit or withdrawal goes wrong it takes time before correspondence rolls out and problem get fixed.
But if people can withdraw, BTC, LTC and Monero I am pretty sure all is fine. If it would not be, there would be way more people complaining. Coem on, there is 31000 people online there, if just every 10th want to withdraw and could not that is 3000 people. Everyone would know that fast.