AdWhilr, iAd ads and impressions

In our free version of our game we use adWhirl. We want to allocate, like everyone, most of our ad space to iAd.

We’ve setup our app to iTunesConnect and enabled the iAd network, allocated traffic to iAd, adMob and our custom Ads and we started receiving ads with no problem. Well, sort of…

Even though in adWhirl dashboard we get impressions for all the networks we’ve enabled in the iAd report in ITC the app counts zero impressions.

Does anyone else have experience with this? is it normal?
Doesn’t displaying test iAd ads means that everything is working ok?

Failed to mention that not only we don’t get impressions but also zero requests.
It would be really helpful if someone had experience with this and pointed us to what the problem is and if it’s something from our end.

For the adwhirl connection we use the Adwhirl plugin from Prime31.