I notice the flicker, but on their worse sets more so than their newer sets. In fact, on the inferior sets I can barely even STAND the flicker.
I notice it more during movies now, but with Cinema Smooth on I don't notice it anymore.
By the way, if I ever said my sister and her husband's Samsung PN64D7000 doesn't buzz while my Samsung PN59D7000 does, I lied. Not intentionally, but I just plopped down in front of their TV, about 14 feet back. BAM! I wasn't even listening for it, and it hit me. At normal volume? Inaudible. Quiet moments? (during films and such) OH YEAH!
Oh, and my F8500 buzzes too, but it's insignificant in comparison to my D7000. Much better!
But, adjusted the brightness settings to be a bit more dull which I didn't like to do, but haven't been noticing it as much. Will enable the Cin Smooth and see what happens.
Haven't called warranty yet, as been giving it time to wear in (hoping the buzzing reduces)...but I'm leaning towards the theory that newer models may not experience issues as much as the older with buzzing. Perhaps they finally tweaked the newer makes just right?