When I decided to withdraw some money from my Kiva account, I was informed:

This email confirms your withdrawal request of $25.00. You can expect the funds to be deposited into your paypal account within 1-3 weeks.

This astonished me. The withdrawal is conducted via paypal (as is the upload). The upload was almost instantly. Therefore I did not expect the withdrawal to take weeks.

BTW: So far my Kiva loans all pay on time.