Blog commenting

[PeterM22]

I have been doing a little bit of testing in regards to blog commenting on high authority blogs that no follow comments. The comments have all been manual and added value to the blog. I have noticed quite a big jump in rankings for some keywords. I was wondering if anyone else has a view on the effectiveness of these links when combined with other link building methods?

[baptisteplace]

Writing useful comments on well trusted blogs obviously give you some sort of juice, even when the link are nofollow. Google surely recognize a link in a blog comment, I don't think he cares much about the rel attribute anymore, much more about the blog metrics and the comment quality.

[Dan-Petrovic]

Google claims that nofollow links do not pass link juice - no matter what. If your tests show otherwise then Google is a liar (or they just don't know how they work internally). To my knowledge proper blog commenting work brings secondary value to a direct link from the page you're commenting on (scraped content links which exclude nofollow, citations, mentions, branding, networking...etc).

[craven22]

Here's a quote by Tompt from one of my posts

The last thing I read about nofollows essentially said that if you nofollow a link it doesn't boost the juice going to the rest of the page, the juice is still essentially "used". Here's theSEOmoz blog post about it.

http://www.seomoz.org/blog/google...

It is from 2009 but one of the mozzers did link to it recenty when asked about nofollows so I would imagine it's still valid.

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Google invests millions into it's algorithm. If you're posting actual useful, relevant stuff which doesn't set off too many spam flags - It'll notice.