McMohan - 6:14 am on Oct 31, 2013 (gmt 0)
Penguin isn't a manual action. It is an algorithmic penalty.
Absolutely. Also my understanding is, Penguin Plugin (since it is only an add-on to the main algorithm) can find and kill regular spam (or over-optimization), such as overuse of money keyword as anchor and skewed ratio of links from sources that don't need editorial review (bookmarks, profile links, comments, articles, forum signature etc). When there are links that the regular Penguin plugin can't deal with, manual review comes into force. There you have the algorithmic and manual penalty.
Also, there was thread I started that discussed how manual penalty is easier to deal with as compared to manual - [webmasterworld.com...]