If she calculates the timeline for the second-generation awakeners, they might manifest their abilities within one to three months. Given that the first awakening occurred six months earlier than anticipated, it's reasonable to expect the second wave to emerge sooner as well.
The same early occurrence could apply to the evolving zombies, especially since they've already seen the signs of zombies evolving and have already encountered two.
Now, only did she realize too, why the evolved zombies are all stronger than superhumans. It might also be because not only do they have the complete power coming from the virus without needing to filter it but because just like on the human's side, the zombies might also have those with talents and gifts, and now that she thinks about it, she hasn't tried peering through the zombies if she could also see their status windows since it was working for the special items with spiritual signatures.