Is it really that surprising that the ad impressions on a platform where the majority of the popular apps are free and ad-driven is outpacing the ad impressions

Is it really that surprising that the ad impressions on a platform where the majority of the popular apps are free and ad-driven is outpacing the ad impressions on a platform where the majority of the popular apps are paid-for and thus don't feature adds? Until there's some parity between the Android Market and the Apple App Store, such that developers can easily accept payments from every supported country, then reports like this are going to continue to be meaningless.