EditorialGuy - 8:16 pm on Jul 13, 2013 (gmt 0)
I recall Matt Cutts saying that Panda updates now roll out over a 10-day period. I'm not sure exactly what that means. I'm guessing that:
1) The new software code is propagated quickly, and signs of its deployment appear almost immediately (as they've been doing in the last day or so).
2) It takes a while for cached rankings/results/whatever to be refreshed. (How much ranking or scoring data is stored in caches, as opposed to being calculated in real time?)
3) The speed (or lack of speed) in seeing ranking changes for any given page also depends on when the page was last crawled.
Are these reasonable suppositions? (There must be some reason why it takes up to 10 days to roll out a Panda update.)