The transaction is quite slow tonight. I paid 5111 satosh/kb, which is the default setting of Core wallet. I have waited for more than 1 hours 20 mins, still no confirmation.
What did you expect when you have people like me who tend to pay 0.01 BTC as a fee or higher? Using the default setting will only make your transactions get thrown in the same bucket as the transactions of a lot of other people that use the same setting. The higher you go (fee wise) the less people there will be before you.