Hey guys, I wanted to ask you something about article directories and 2.0webs. If the pages of a website have only this type of backlinks (relevant and unique content), are they still going to be hit by Penguin? Or do we still need to mix them with other type of content, maybe guest posts from similar websites...or something like that?
Nope. thats actually what google wants. Good quality content which is measured by powe & relevance of links in my opinion
It's better to mix no-follow and do-follow links from different resources to look natural. Note that it's better to have more no-follow links then do-follow.