do you mean for backlinks? it depends on the blog. some blog will allow google to count links in comments as back link. and some other not. depend on if those blog dofollow or nofollow
The PR does matter. See http://forums.digitalpoint.com/showpost.php?p=12511383&postcount=4 where I basically answered the same question
Commenting on dofollow blogs with your anchor text is an excellent technique for building rankings. Although there is less weight than that of an actual homepage type permanent link, a lot of high quality blog comments can be equal to that of an homepage link.
How do google look into the anchor text with dofollow on blogs with dofollow comment enabled ? Will it be counted as backlink to the site ?
Several points it seems that many are hung on the concept of page rank Relevance is key and most important On top of that page rank is now only one of the factors involved in final placement and calculations when it comes to results in searches on Google I have specific examples of a couple of zero page rank sites that rank very well in competitive search engine searches Get off of page rank as the most and only important criteria
It matters because the higher the PR the better the link. Obviously, it's still worth the time to add a link if you're already on the site as PR's increase every few months visibly, but are usually updated as soon as links are added or removed. (Toolbar PRs are incorrect, they only show the last PR they had at an update).
There is an addon in firefox called No Do Follow, u can download that to help u to check! Hope that will help! Cheers!
Your post says the higher the PR, the more authoritative the site. I (and the peeps over at SEOMoz) might disagree with this. PR is a measure of link popularity, not authority. Supposedly a site with most of their inbound links pointing to their home page is NOT seen as an authority, even though their home page may have lots of inbound links and a high PR. Sites with the same number of links pointing to lots of different pages on the site are seen as more of an authority than those that mainly have links to a single page... which makes total sense IMO. When you have lots of links to various inner pages, sites are "citing" you as an authority on lots of topics related to your site's vertical... you're seen has having a variety of content about your verticle on your site that is worth linking to. If you have a 1000 page sites and 98% of your links are to your home page, that says pretty much that 999 pages on your site aren't worth linking to... not much of an authority on your site's general topic. PR of the page that links to you is worthless in determining how your URL ranks for a particular keyword phrase if the link text is click here. It's not worth much even if the link text is good but the page containing the link is irrelevant. It only seems to really add "punch" to the link if the page is relevant and the link text targets the user's search phrase. So it does can a noticable difference... but only when the link text is relevant and the page it's on is also relevant. I would rather have relevant link text on a relevant page w/ PR0 or PR1 any day over relevant link text on an irrelevant PR5 page, at least for Google rankings. Yahoo and other engines might be a different story.