Re: @jmch
@DougS - "That "reworking" involves going through an intermediary - it is no longer directly peer to peer. "
That's not how I read the article. The reworking for iOS 6 had to go through an intermediary so as not to violate the patent. iOS 7 had an Apple-brand (non-patent-infringing) peer-to-peer reworking. Apple first tried to force its users to upgrade to iOS 7 so they could use the new Apple peer-to-peer feature rather than the intermediary (which Apple had to pay for). When many Apple users stuck to iOS 6, Apple didn't want to keep paying the intermediary and so pulled the plug on Facetime for iOS 6.
So the patent clearly does not cover all instances of peer-to-peer videocalling since iOS 7 version is non-infringing