That's not true, linking to other sites (unless banned or penalised) will not harm or detract from your PR, though it will limit the amount of PR that particular page can pass on to others, though any link will do this, relavancy doesn't come into it. A simplistic example of how this works, A page has a PR of 10, it links to one other page and passes a PR value of 8. The linked to page therefor is a PR8. The orginal page retains it's PR of 10 Another page also has a PR of 10. It links to two other pages, passing on a PR value of 8. The two target pages attain a PR value of 4. The original page retains it's PR of 10. 1. The more pages a page links to the lower the PR value it passes on to each 2. Linking to any number of pages doesn not detract from the PR value of the original page.
every good backlinks count as long as they from good websites and not bad.. all the good links counts and gets indexed..
Simple Rules: 1)Backlinks should come from Relevant sites. 2) High PR links are valuable for only increasing your Page Rank, not directly on SERPs. So now the question is what should we do?? Quality or Quantity?? In my opinion Quality is the first, when it hard to obtain then at least not loose Quantity.
There's a secret formula used to determine the 'link juice' a given backlink provides, some provide little value, the 100th nofollow comment on an unrelated page of a low ranked blog is probably not worth the effort. Generally you don't get penalized for low quality links from a bad neighborhood, otherwise competitors would be routinely sabotage competitors by buying them links from no-no sites. Examine other sites in your field in yahoo site explorer to get an idea of the kind of links they are getting. A link in a guest blog article for an influential blog is probably worth more than 100 junk comments. An aside, besides the quality of the link source, the anchor text of the link, like keywords on your site is important for enhancing the keyword ranking of a page. "Dog training Tips" is a more useful than the name field entry "Benny" in a blog comment. Some day, down the road when their site is ranking well, one might regret the number of spam comments backlinks from unrelated blogs that were used to initially to nudge the needle.