On Bitgrail, XRP deposit are checked every 5 minutes, and withdraw every 10 minutes.
Bitcoin deposit require 3 confirmations.
Made my first transaction here with bitcoin and i will be testing the xrb deposits as withdraw, by the way the exchange has no fees in your trades, you can trade for free on the next days, what you waiting for to join the dedicated exchange bitgrail. Still buying mrai pm at telegram as : aloganmanu, price based in bitgrail.