The only complaints I have seen about not being able to withdraw from Polo are usually issues with the coin (wallet/network/dev team), not with the exchange. I haven't had issues withdrawing BTC at all over the last couple years.
I'm not referring to the last couple years, all the complaints exploded over the last couple months. But it could be explained by increased volume. We have to see if there continues to be problems with withdrawals over the next few months.
I've heard of zero complaints about them from anyone that is reputable. The only real issues I've heard of are slow verification processes, but nothing shady.
This. Some users have gotten so used to the fast withdrawal times in the past, and now that Poloniex have become a lot stricter in their withdrawal process those people are now trying to create a scene that Poloniex is freezing their withdrawals indefinitely.
I dont know if its true but some say that verified accounts' withdrawals are processed faster. Can anyone confirm this?