Mostly every coin will be send instant. You will get a personal transaction. But Bitcoin is different. Since 2 January 2018 Coinhouse has added batched bitcoin transactions. These transactions need to be filled with multiple withdrawals. Depending on the amount of withdrawal requests, that will calculate how often transactions will be done. Currently this is a few times a day. But this will ge more often after more withdrawal requests.

Why did conhouse introduce this feature?

Batched transactions will cut transaction confirmation time and also fees will be cut. Also this is more efficient for the bitcoin network because we do more withdraws/payments in just one transaction. This will cut the amount of bytes and also the amount of fees which are needed to get accepted into a new block on the network.