new OEM front rotors out of round?

[we350z]

How likely is this? I talked to my mechanic about my steering wheel jerk/shimmy issue after changing my rotors and seems to think that the front rotors may be out of round and causing this. He says this is not uncommon and that he sees it quite a bit. According to him many of the warehouses stack the rotor boxes on stop of each other and this can cause the rotors to become out of round. From various tests in my other thread I linked to I have determined that I do not have a stuck caliper, and I just did a brake bleeding which did not help either.

I ordered the OEM rotors from Crevier a couple months ago. They look fine when I spin them on the wheel but he said I wouldn't be able to tell by eye. They probably have <200mi on them total. The indy mechanic went on to say only the fronts would cause the steering wheel to shimmy/shake.

The only other thing he thinks it could be (and everyone in my previous thread) is if one or more of the control arm/thrust arm bushings are completely shot. I did the wheel shake test with the front lifted and both wheels seem very sturdy with very little play.

I suppose i could switch the rotors side to side to see if the jerk changes direction. Is this OK to do once the rotors have been mounted?

Will I be able to get a replacement set out of Crevier if they are defective?