I never said they were the same as any other manufacturer, I said they generally have more quality control issues than other manufacturers. I qualified that because I've seen some really dreadful quality control on some US-made guns lately, particularly a Marlin I bought and returned recently.
Safety inspections on Norcs won't always turn up issues. Mine all headspace within NATO no-go, are properly indexed, have no problems with bolt setback and have no "fire control issues". That's out of the box on all three. However, those issues are often present and should be inspected for.
Here's what I did before ever shooting my first two Norcs: I read every sticky here and everything else I could find; I tore them apart and visually inspected every component for obvious defects; I paid a gunsmith to inspect them as well, particularly to try to ensure that sear engagement, the safety, and the safety bridge were working properly; I borrowed a set of files like this one
http://www.amazon.com/Flexbar-Hardness-Testing-File-Set/dp/B001CTI7TE from work to check for sub-par hardness on the bolt, receiver, barrel, gas tube, gas piston, op-rod, hammer, firing pin and sear; I checked the headspace to ensure that it was over NATO Go and under NATO No-Go; I checked bolt lug engagement to make sure it was even on both sides; I also performed a tilt test and function test.
When I bought my third one I skipped the gunsmith inspection, as I felt confident in my own observations by then. All three had been proof fired and included the fired casing and the tester's initials. I felt confident in them when I first fired them and now, many rounds later, I feel even more confident.