As I understand it iOS 5 onwards supports delta updates. My understanding of a delta update is a very small code change to fix minor issues. With that it mind I thought we would be seeing these little iOS patches every couple of weeks. iOS 5 received a couple of updates in its life cycle and it looks like that's all iOS 6 is going to get. The delta updates seem to have quietly gone by the wayside and it can't be said that iOS 6 is perfectly functional by any means!!