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
I am sure that every gambler really like the instant withdraws but as you say, we still need to wait a minute or so to see the transaction gets confirmed. We know that sometimes the confirmation needs a long time to confirm but if in the network doesn't have too many delays transaction, it will get confirmed within a minute.