DPP will not match the settings of Zoombrowser.
I emailed Canon about this over a year ago. They reiplied that Zoombrowser and DPP use different algorithms for RAW image processing. Zoombrowser uses algorithms that either is the same as the DIGIC chip in camera, or very close... therefore results that match out of camera .jpg. What's more, since the algorithms are different, there are no settings in DPP that you can easily adjust (say boost contrast, boost saturation) that will MATCH zoombrowser's output consistently.
That's one of the things you'll realize about RAW. Every converter processes differently, and for the most part settings from one are not transferable to another (again... +1 saturation in one is not = +1 in another.)
Also, the washed out "flat" look is typical for default conversion in many RAW converters, because they are not applying the contrast/saturation/tone curve that the camera is automatically applying to the .jpg image out of camera.
That said... if output .jpg isn't matching how it appears in DPP, check your color settings. Also, are you calibrating your monitor? I believe you must point DPP at the correct monitor profile (it doesn't use it automatically like Photoshop.... unless they've changed that recently.)