Not worthy of being mentioned!; its just some stock wheelset that comes with a complete bike. Now that someone's mentioned it, my friend's Powertap steel hub has the same mileage as mine yet the hub has no bite marks whatsoever. I also just assumed his guads were not worthy.

I dont use a torque wrench but I tighten the lockring as far as I can by hand. I will find a bigger wrench for the job. However, I'm wondering, if you put enough torque on the cassette, wouldn't it still bite into squishy aluminum?