I shoot Raw. Convert to DNG and then process with Photoshop CS5 and/or Lightroom 4.
My comments refer to then entire ISO Range.
Lenses I have noticed my statements to hold true: 24-105mm f4, 17-40mm f4, 100mm f2.8 Macro, 70-200mm f4, 300mm f2.8, 600mm f4
Mounted on a Gitzo Systematic Carbon Tribod with WH200 Wimberley Head.
Anything else you curious about?