A jailbreak for the iPad Air will like arrive at the same time as a jailbreak for the iPhone 5S since both run on the latest A7 processor. When a jailbreak is rolled out, support for A4 (bootrom exploit), A5, A6, and A7 processor models are individually jailbroken. The latest rumblings from the jailbreak community supports that a jailbreak will likely be offered for the entire line of iOS 7 devices, which goes back to the iPhone 4/4S.
Personally, I still have my iPhone 5 and my iPad Mini jailbroken running iOS 6.1.2 which makes it tough to keep up on iOS 7 and the latest Apple devices. It is unlikely that a jailbreak will be released for iOS 7 in the next couple weeks, it will likely take months for the latest iOS jailbreak. The days to jailbreak has been progressively getting longer, and iOS 7 has now been available for over a month.
Time will only tell for the iOS 7 jailbreak.