So let's say CNN posts a new article and in that article there is a do-follow backlink to your money site. Because it is a new article, this new article will appear on a new page on CNN. According to my friend, because this is a new page on CNN, there are very few external links that point to this new page (or new article). And because there are few external links that point to this new page, this will not be an authoritative page yet (ie. the page will have a PA of 1).
My friend went on to say, when other websites posts links to this new article/page on CNN, then the page will achieve higher authority (ie. a higher PA) and then the backlink from this article on CNN will help to boost your money site. However, until this new page on CNN acquires more external links that point to it, the backlink to your money site from this new page on CNN will do little to boost your website.
Is this correct? What is your experience with a backlink from a new page from an authoritative website such as CNN or Wikipedia (or some other well known authoritative website)?