Thank you.
iAds just started appearing today - so I've had one week on the app store with not a single impression! Usually iAds appears after 2 or 3 days from release, but for some reason it took longer this time which is a shame, as Apple give you a 7 day search boost in the App Store.
So far it's had 3K downloads with little marketing . I'm working on an Android port this week.