I was looking up something Panda-related yesterday and stumbled across an article written in August of this year about Panda recoveries. One suggestion it had for figuring out which section(s) of your site were hit by Panda was to break down your site into small chunks in sitemaps (by category, folder, or whatever) and submit those to GWT and see which areas had noticeable discrepancies between submitted and indexed numbers.
Has anyone tried this idea and found it to be helpful (or accurate)? I've already noindexed my "bad" content so I'm not sure I'd see anything really stand out at this point but I'm curious about this method. I was also under the assumption that Panda-hit pages were still in the index and that was what was bringing the site down (or is that assumption wrong?)