Hello!

I'm a DIY mechanic, I've replaced wheel bearings before in Audis because they like to eat them for breakfast. In all cases, when I've gotten everything disconnected and tried to spin the hub/bearing by hand, it always felt rough or grainy instead of smooth, even without being under the weight of the car. And after pressing in the new bearing and hub, it always felt perfectly smooth to spin by hand before reinstalling onto the car.
Now I'm currently working on one on my GFs 2007 Aveo, it's front drivers side. I've got everything all apart but spinning the hub by hand feels perfectly smooth! So my questions are:
1) Have you ever replaced a wheel bearing that was definitely bad but still felt smooth to rotate by hand?
2) If not, what else on an Aveo would sound exactly like a bad wheel bearing but actually is something else?
Thanks!