canuckseo - 5:05 pm on Feb 21, 2013 (gmt 0)
And with regards to ANY google update - I've found its best to wait and watch - i've had sites drop before or during an update only to recover shortly after. Similarly, some sites get a spike before the update and settle back to where they were.
My point is, wait and see. I know it can be hard if your site has suddenly seemed to disappear but you have to do it.
My own site disappeared from Google during an update - completely gone - even a site: search didn't show it. But 24 hours later it was back. Just a glitch in the Matrix I guess :)