I don't know if the authors would agree, but Dalvik's JIT compiler appears to be a "precision" JIT. The goals for Dalvik's JIT compiler were to speed up apps without reducing battery life by focusing on compiling only the parts of code that will deliver the most performance increase.

One can also suppose that, with more memory and more power-efficient processors, Google has calculated that in real-world cases, ART's pre-compiler delivers more benefits in performance dimensions than it costs in space and power dimensions.