False. There more to it than just counting a handful of defective pixels. If the only issue you have is a couple dead or stuck pixels, you may consider yourself lucky. Or you're just not comparing it to an A+ panel so it looks perfect to you. There is also backlight bleed, which has nothing to do with the above explanation. And sometimes splotchy, tinted, or incorrect colors, but if those are noticeable then you may consider yourself especially unlucky.
Back light bleed is NOT a consideration of the panel quality. That is a function of the underlying PCBs and engineering to drive the panel. It does track that the higher the grade panel, the less bleed you will see, but that has more to due to the higher quality panels being used with higher quality other components than the panel grade itself.