I like that sportsbet has instant withdraws and since they pay the fee the Bitcoin always arrives fast
I dont know of any BTC casinos that really offer instant withdraws even sportsbet takes a minute or so
It is normal to have delays cause all transaction will undergo process even sportbet withdrawal, but having to much delay will never be good at all.
Delays will never give me a huge deal, the most important we are secured and we are playing in the right place(legit site).
Sportsbet never delays, if ever you experience delays of withdrawal, it's just in rare occasion.
I've been regularly making deposits and withdrawals and I can tell I never have to wait long for my withdrawal to process.
And @mich is correct because they pay for the blockchain fee, good features on this site and good for gamblers who constantly transact.