Yea I should explain:
The thin-wide rectangle near the top of that picture is a cut from an export-frame rom premier cs6 (notice its slightly grainier/blockier).
The rest of the picture is a screen capture from the raw M2V file played on a media player (same in VLC, WMP & others)
I cut a part of the export-frame from premier and placed it over the screen-cap from a media player, to show the grain problem (the area around that noisy-rectangle is how its supposed to look, the noisy rectangle is how it looks in CS6)
I know it looks suttle but it makes a huge difference, when I export a 720p it has serious blur/grain and when I export a 1080 its even worse