There's like a really faint flicker on my monitor. It usually is best visible when dark colors are on screen. It looks like several bars stretching from the left to right edge flickering softly, but not enough to hinder vision. I can also kinda-sorta see it when I'm out of games, too.
I have a GeForce GTX 660 Ti (2GB), a 1920x1080 monitor, and I'm running Windows 8.