1) The resulting dng I get are not clean when I open them up in ACR (of Cineform Studio) ie. they have a green "tint" (or red - depends on what program I am opening the dng's with). why is that ? I see the everyone here displays a "regular" picture...
2) in ACR, the file says : 8bit (on the info line). shouldn't it be like 14bit ?
3) in ACR, how do you turn on the thumbnail display (to the left) so one can synchronize all the photos ?
1) At the moment the white balance is just a placeholder. The .raw files have no metadata so raw2dng simply adds fake metadata which results in a wrong white balance. But a1ex is thinking about adding the correct metadata.
2) That's just what ACR suggest you to work with. Simply set it to 16-bit and you'll be fine (If you don't use elements).
3) To synchronize all photos just select all of them and then do the changes. Maybe there's a better way, I don't use ACR but LR.
I shoot Raw with my 8/16 GB SanDisk Ultra 30MB/s...
Nothing more than 3 seconds still at 960*540...
Doing the ML test and results that it write at 8MB/s...
How it's possible?
Your card is simply not as good as advertised by the manufacturer. No real surprise, isn't it? They want to sell these things so they make them look better than they are. A quite cheap SD-card that actually has a write speed of more than 21 Megabyte/s:
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SanDisk Extreme 16 GB SDHC Class 10 UHS-1 45MB/s | Amazon.comI use that myself and it works fine. The 95 MB/s version is said to be good too but ... you know ... 21 Megabyte/s write speed limit

Just did another RAW vs. H.264 comparison, and this is the biggest difference I've seen between the two yet. Exact same lighting conditions and exact same camera settings, but the RAW version is at least 10x better.
Same settings? So you didn't changed the focal length and simply croped the H.264 to match the raw image? If that's true, your comparison is completely useless. To compare H.264 and raw you have to count in the new crop factor you get with raw video! See here:
Width | Cropfactor | Multiple of H.264 crop
1734 = 1.60 | 1
1280 = 2.17 | 1.36
960 = 2.89 | 1.81
720 = 3.85 | 2.41
So if you shoot a video in 1920 X 1080 H.264 at 55mm and you want to compare it with a 960 X 540 raw video you have to change the focal length to 30mm (55 / 1.81 = 30).
Edit: Damn. No I tried to answer that questions and totally forgot what I wanted to ask

@1%: Since raw is a dead end on the 600D (Even with 8-bit compression we couldn't record higher than 1280 X 720

), what's about recording YUV 422? Is anybody still working on that for the low speed cameras?
I mean, lv_rec still had the option to record YUV 422 "video". It was just to early to be good ... But now, wouldn't it be a nice to make a yuv_rec module for 600D/550D/60D(/6D)?