First of all, what is all this Google Caffeine. A bit of old news, but a quick recap to contextualise this link below.
This is an update to Google’s underlying infrastructure and a rebuild of the code to handle their index and runtime indexes.
If you look at the video on MC’s blog. MC talks about it and it is quite straight forward set of changes most businesses do or should do. In the long term for businesses with fresh content, timely information, who are continually growing, it should be a good thing.
I am sure at the time, you were asked by some high ranking colleagues about your future rankings. You will still need to do it one term at a time, but this on the Sembience site is a useful Caffeine checking tool.