Google changes its algorithm plenty of times within a year. Mostly made minor changes and Google flushed out a major algorithmic such as Google Panda and Penguin.
Penguin 2.1 was released in 2013 and not a major change to the penguin algorithm.
Recently Google panda 4.1 was added with some new signals. It is helpful for small or medium size businesses.
The Penguin 3.0 new update will support faster refreshes of the Penguin in the future and this update will be easier. He guesses a lot like how panda is run monthly now.
He said, Penguin refreshes will be less painful and would have hurt more webmasters. It will be a delight for most webmasters. Google has done some initial process to stage this new update.