But this article and the original comment are about the ZenFone 2, which is specifically running Lollipop. So it has the ART runtime, and JIT is not happening on it, and the OP was asking about things being compiled for this non-ARM architecture.
Notwithstanding all that, I have a Dell Venue 7 that's also got an x86 chip in it, it gets very reasonable battery life, and performs perfectly fine. I don't think I've found a single app that hasn't worked with it, either, including many games and such. I've got a Zenfone 2 on order to replace my aging HTC One M7, I'm reasonably certain that it'll behave quite well.