There are ways te recover from panda, just the majority of large-site owners don't feel like the rigorous review that must be done to identify problems and attempt to remedy them. Look for content that has a high bounce rate pre-panda. Scrutinize it with the 22 questions google put out, re write it to be THE SOURCE of information on that topic. If you are unsure about some content, put it on an island, a subdomain for example, and see what kind of search impact it has for those keywords.
For those concerned that the google crawl spike is indicative of getting nailed by panda - it is not, i have a few sites that were crawled at double rates for a day and have had no panda issue.
Also, if you think you have been hit, check your organic search traffic, if this seems to be the same, it is probably not panda.