Recognizing a back link

[lexnex]

Have you conducted or know of any research/studies that examines when the inherited value of a backlink is actually attributed to the detination url?  Meaning if abc.com links to xyz.com today with a unique long-tailed anchor tag, at what point would Google actually recognize the value of that link to xyc.com (ie increasing in the SERPs for that anchor).  My first inclination would be at the point of indexation of the link but from my own casual analysis, I havent proved this to be true.  Obviously we dont know exactly how google does this, but have you drawn any conclusions based upon your own findings?  Perhaps there's a period of link evaluation post indexation before passing value in terms of ranking relevance?

thanks!

[Thos003]

The Caffeine udate was claimed to make instant updates to the Index. To me this suggests that as soon as the link is indexed it gives value. However, part of Google's patent suggests evaluation of links over time, so the history of a link could add value to that link. So like fine wine, links with age are worth more.So the value you are looking for may not be achieved until the link itself as aged and increased in value.

What you suggest is that in your findings the value of a link is not immediate for ranking. I believe that is heavily dependant on the difficulty of the desired ranking. I have seen a link or two provide imediate value on obscure rankings. Where as, competitive rankings need the added value of time and quantity.

Take an average for 10 5-star reviews. Not competitive. Easy to move the average by a few more reviews. Now consider average from 100 reviews. Much harder to move average. Take 10000 reviews and a new review is a drop in a bucket.

Very competitive rankings will not see immediate value.

Disclaimer, I am a pest control guy.