The data is transferred at lightning speed! :D The PayPal Tracking Autopilot for Shopify recognizes new data immediately and transfers it to Paypal in a few seconds. Usually information will be completely transferred in 1-2 minutes. If you are very successful and transfer more than 1000 tracking data simultaneously, it can take up several minutes.
Funfact: Even with large amounts of data we usually need less than one second per tracking info for the data transfer.