I think the point of that test is to weed out boards of marginal quality that are likely to fail early in their lifetime. Those that pass are likely to last much longer. Read about the "bathtub curve" used in reliability engineering: defective units tend to fail quickly and non-defective units tend to last a long time.
If you think it's worth having confidence that your motherboard won't fail early, even if it means possibly failing a week sooner many years from now, buy the "black edition" board. If you want to get that extra week of lifetime, but with an increased risk that the board might die a few days after you install it, buy the regular version. Consider the price difference vs. the hassle of doing a warranty replacement.