Zoombrowser (Canon's software) is the only one I can find that will produce images matching the in-camera jpeg by default. DPP (even though it is Canon's software too) does NOT.
On that note, I was wondering if anyone here has found what parameters to adjust in DPP to best match? I tend to shoot with Parameter 1, which boosts sharpness, saturation, and contrast... but I can't pin that down in DPP to match the in camera jpg.

