From what I remember, when I got my Canon Mark II, the jpegs were soft until I increased the sharp setting in camera. It was said at the time that the Mark II images resembled close to raw in jpeg settings and had a soft look. The images needed sharpening and they turned out fine once I sharpened them. I was awfully paranoid at first. I'm guessing the 5D Mark III is no different. unsharpened Raws and normal jpeg settings are going to net softer looking photos until post production corrections are made or high sharpen camera settings are applied.