It's actually impossible to reliably get a transaction confirmed in the 15 minutes that BitPay (who they used) is willing to lock in an exchange rate for, regar

It's actually impossible to reliably get a transaction confirmed in the 15 minutes that BitPay (who they used) is willing to lock in an exchange rate for, regardless of load on the network. The earliest a transaction can confirm is on the next block, and there's about a 25% chance no block will be mined by then.