Why Google make minor backlink updates?

Romour said that Google want to strike back
on the PR linkbroker's and grap em' by the ball's.

Take away valuable information from the PR-toolbar
and make it even harder to use programs like
PRprowler, linkproctor, seospider ect
(dont they work together with the API)
analyze backlink strategi, linkpopularity options

Ok you can use (ex. PROG) and find high rank site's but determite "who is linking to whom"
and what will ticle big G, What is the hidden algo' :O)

What we know is that you have to be serius
with the theme, is it relevant to your content?

Second we know that "oneway link" is better than RECIPROCAL link's, but how much count
High PR backlinks?
(even they are not listet in backlink lookup)

How can you count the exact
number of link pointing to your domain?

Their is a big difference in number's from machine
to machine and with different technic's as well

ex:
search term: your domain name
(link:http://www.site.com)
http://www.linkpopularity.com

The whole concept many people fail to grasp with SEO is that many people look for exact tangible values.

I don't do that.

I look for patterns and try to figure out what is going out and why. Look for what is effective and duplicate it over and over and over and make sure I have done it more than any of my competitors.

Over time my sites will rank well if I do that.