crobb305 - 5:56 pm on Mar 20, 2011 (gmt 0)
.. As a website is updated, recrawled, reindexed, and with that, the site's signals reassessed, our algorithms will take those changes into account and treat the website accordingly
The problem is, all sites are crawled with different frequency/regularity. I believe these penalties are applied/lifted in response to a particular crawler, and you can see its frequency in your WMT (spikes). I don't think the daily crawler is going to be responsible for any changes in ranking. If your site is deep-crawled every 3 months, that might be how long you have to wait. Just based on my observations, of penalties coinciding with the deep crawl. Others may have a different experience, but I don't expect to see any changes in my penalty until my site gets another deep crawl (3 to 4 weeks from now, unless it comes around sooner, off the normal pattern).