Problems with Canon 7D .cr2 files

Hello, this question may have already been asked but I have been unable to find an answer -- if it is in another discussion, please feel free to direct me there.
I have .cr2 files from a Canon 7D that produce significantly different results in Lightroom 3.3 versus Canon's Digital Photo Professional (3.7.1.1) software -- that is, the LR3.3 results show much poorer quality than DPP, with terrible grain throughout. There is also a significant color shift. These results carry through to output files (e.g. 16-bit TIFF, no compression), rendering Lightroom essentially unusable for developing my RAW .cr2 files, since they are not being rendered at highest quality.
Here is a 1:1 comparison below. This image below is a more extreme example to demonstrate the issue, shot at ISO 3200 f/5.6 1/100 sec.
And, albeit slightly more subtle, the grain is still clearly present in images shot at ISO 100.
I previously used ACR in CS4 to review my .cr2 files when I purchased my 7D fall 2009, but found the grain so distracting that I switched to DPP with much cleaner results. I chalked the grain in ACR up to an early pass at reading the 7D .cr2's. When upgrading to LR3 I expected the render to be better refined, only to find it as bad as ACR CS4.
If the grain is a permanent fixture of .cr2 RAW files in the ACR engine, LR3 is pretty much worthless to me. I had hoped to be able to quickly catalog/review and develop using the LR interface, instead of manually cataloging images, then going to DPP for TIFF output, and then Bridge/ACR for development.
Any insight or advice on a good fix would be much appreciated.

What noise reduction are you applying in LR?
LR's noise reduction in LR 3 is just about the best I have ever seen and certainly far superior to anything in DPP. If you are just looking at the initial preview then only a minimum amount of colour noise reduction and no luminance noise reduction is applied by default, where as DPP applies considerable noise reduction based on in camera settings. LR previews will not match DPP's inital previews of the files, but the tools in LR enable you to produce far better final results.

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