I've noticed the green cluster of specks, but it only shows after going from Bootloader to the boot animation. Seems it's only noticeable on a black screen. So you really can't see it as it only happens during a black screen, and to be honest, I don't stare at a black screen too much
I'm beginning to think it's software related rather than hardware, as I didn't notice it on the KK 4.4.4 build. Only after I went to the first LL release. Going to switch to the most recent release soon.
So it doesn't seem to affect any other colors, so I'm not worried too much about it as all other apps it is not noticeable. Perhaps in some games it may show if the game uses a predominant black background.