I've 'removed' over 2K pages from one site after Panda 2.2. I'll have to wait until 2.3 or 3.0 to see if it helped.
I suspect the noindexing is only going to help if the rest of the site is up to par. The noindexed sections were autogenerated, but a lot of the remaining non-autogenerated content is thin.
Panda is pretty complex, so it's likely many changes beyond no-indexing will be necessary.
I'm doing a test on another site to see if Panda will allow one-page sites (just the home page with everything else noindexed), where that page is long and has high value.
Panda may use word count and keyword density to test the thinness and uniqueness of each page, and then compare that to other sites to see if it's really unique.
Repetitive pages will probably still get Pandalized even if the page's main idea and/or content wasn't copied from another site.
In 2011 repetition is out.