Here are some related threads: http://forums.digitalpoint.com/showthread.php?t=1487343 http://forums.digitalpoint.com/showthread.php?t=1641178&highlight=Google+Caffeine http://forums.digitalpoint.com/showthread.php?t=1713058&highlight=Google+Caffeine http://forums.digitalpoint.com/showthread.php?t=1699686&highlight=Google+Caffeine hope it helps..
All Google updates surely effect the all sites but I always prefer high quality and relevant sites for promotion.
Google Caffeine is introduced for speeding up Google indexing. This major update was completed in 2010 but results visible results were experienced in January 2011. Refer this blog post for more info, http://googleblog.blogspot.com/2010/06/our-new-search-index-caffeine.html
I thought was just a plan without end. There is no caffeinisated google. Google is now on Panda mode. www.youtube.com/watch?v=FzRH3iTQPrk
I have heard many times about Google Caffeine but I'm not sure about it's working style. I have read many review about it that it's increase google indexing speed and power.
Try to find some information about Google Caffeine in this link: http://www.helium.com/items/1861817-google-caffeine