White / Blank iAd's showing up after posting to the App Store

Ads were properly reporting “Connected to iAd” during Development, now they’re appearing White / Blank on the live version. Is this expected during the initial hours/days of release?

It also happened to us with our own game. Ads take some hours/days to go live. You should receive a message on iTunesConnect when they are ready.

Finally, they’re online.

For those interested, it took 4 business days to show up for a new company and app submission AFTER the app was approved.

Company Registration > Contracts Filled Out > App Submitted > Waiting for Review > In Review > Released > “Your App is receiving live ads” but no ads were showing up > 4 Business Days > Ads started showing up