I think Android permissions are probably the best at the moment, because they actually exist, are centrally located, and are easy to read. You won't see any certain permission detail longer than a few sentences. They also are shared, so if you have seen one permission for an app to access your contacts, it will be the same in all apps. Apple requires less permissions disclosure and they can be listed in the app store, or on the developers site.

However, ideally I would like to see the current Android permissions segmented further. Right now they act as a catch all to ensure all bases are covered. This is often way beyond what most apps need and actually use, making users second guess what they are installing (at least, they do for me).