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Just to add, I have found that in certain situations, I LOVE shooting JPG with this camera.
I've been shooting college hockey for a few years, and in the past I've used a 1D2n, 1D2, 1D3, 5D Mark II, 50D, and 40D. I tried shooting JPG with them, but never loved the files.
But with the 1D X, if I shoot RAW, I simply cannot replicate the quality of JPG's I get straight out of the camera while I am shooting hockey. It seems no matter what curves adjustments I make in lightroom, no matter what I try, they just don't end up looking as good as the JPG's. On the camera I have auto lighting optimizer turned on to standard (which helps brighten up their faces in the masks), high ISO speed noise reduction set to standard, I bump exposure compensation up 1 stop, leave it on auto ISO, minimum shutter speed set to 1/500, auto white balance, and usually shoot in Av at f/4. The only adjustments I then make in Lightroom is a batch white balance change, usually a tint adjustment and they're good to go. I'm really impressed! The contrast, clarity, detail, color, everything are really nice and the girls on the team LOVE the photos. What also helps too is the 1DX's exposure consistency, it doesn't freak out when it sees a lot of bright white ice and turn the exposure way down despite my adjustment, it's very consistently spot on.
Here are some photos from the other night - http://willpphoto.smugmug.com/Sports/Geneseo-home-12-8-12/