Well there is one thing that is not being discussed and that is are Chinese jailbreakers smarter than American ones? The last two jailbreaks have been released by Chinese groups and they have been released fairly quickly after an iOS update release comes out. They don't make excuses like having to wait for the next release of iOS to use an exploit like American jailbreakers do. They just find a new exploit when an update comes out. I think for the foreseeable future we may see future jailbreaks continue to come from the Chinese because quite frankly, they are better at it.