Unless you are in a hurry to spend the funds, long time for confirmations is not a problem at all.
Even with a zero confirmation transaction you can rest assured that the coins will arrive at your wallet, as the exchange already sent them..
When it comes to genuine exchanges like Dex.fo then it makes sense to wait sometime to get the funds. Since sometimes network can be congested and that means a transaction will take some time but most probably those transactions get completed on time.
Only in few cases, transactions can take sometime, in most cases they get completed in short time. For Bitcoin transactions one has to wait at least 10-40 minutes as that's the most probable time frame to have confirmations if network isn't congested.
