I would not say that there is no any relationship with v7n.com's PR6.
Yet V7N did a good job with anchor tag "webmaster forums" at homepage
Also v7n homepage is a very important page and listing a set key phrase="webmaster forums" as a hidden SERP
http://link.ezer.com/tools/google_se...rums&u=v7n.com
It does prove the proper text link does help to gain a specific high ranking search result.