The majority of SEOs believe Google’s Penguin update is about links and it is a link based algorithm.

Google has never fully confirmed it is a primarily link based algorithm but maybe that has changed?

Google’s Matt Cutts responded to a question on Twitter saying:

The hard part here is that Matt was not being specific in his response. Yes, he was responding to the question that read:

But is that response a general response or a Penguin specific response?

Only Matt knows for sure, but I thought I point it out.

I did ask Matt what he was referring to specifically but I did not yet receive a response.

Forum discussion at Twitter.