What's the fee rate used?
The network has been busy today... it has spiked from less than 10K unconfirmed to around 30K unconfirmed... and as a result the fees have increased a little... this will mean that low fee transactions might be delayed more than normal.
It's actually way lower than the normal.
According to users in the NiceHash thread[1], they are sending transactions with a 6 sat/byte fee. And people are complaining that they need to wait for more than 48 hours to get the transaction confirmed by the network.
About the network, I really noticed that transactions are starting to take a little bit more to get confirmed than those last few days when we got less transactions because of the imminent BCC fork. Last week I could send transactions with a 40 sat/byte fee and get my tx confirmed in 1-2 hours. Today I sent some BTC to Bittrex and it took 4 hours with a 87 sat/byte fee. That's really sad.
[1]
https://bitcointalk.org/index.php?topic=562238.5940