Many are reporting PayPal taking quite a bit of time to update when it is first added. The first time you add PayPal you are downloading over 12 months worth of data. This probably means hundreds if not thousands of transactions. This can take quite a bit of time, sometimes more than just a few hours. Depending on how much data you have, the time period will be different.
In the meantime, you don't have to wait around. Feel free to poke around the application or simply close it and come back later. The downloading will continue even if you close the application.
Once this initial update happens, PayPal will continue to stay up to date, so the updates will usually take minutes not hours.
As always, if you have further questions, feel free to contact us at firstname.lastname@example.org.