Its some strange thing, noone knows yet. Certainly better than an A9 though. http://www.anandtech.com/show/6292/iphone-5-a6-not-a15-custom-core
Krait was first based on the A15 though right? So Android phones had A15 based CPUs already.
This whole thread is bit wacky, maybe it is just when Apple gets mentioned more of the less tech savvy folks get involved.