It seems that Google has indeed increased the frequency in its PageRank updates. I have seen a definite change on sites that I am working with. Quite a few of the sites suddenly went up one point, and upon investigating a bit, (thanks Search Engine Journal) it seems I am not the only one.
Google describes PageRank as:
PageRank relies on the uniquely democratic nature of the web by using its vast link structure as an indicator of an individual page’s value. In essence, Google interprets a link from page A to page B as a vote, by page A, for page B. But, Google looks at more than the sheer volume of votes, or links a page receives; it also analyzes the page that casts the vote. Votes cast by pages that are themselves “important” weigh more heavily and help to make other pages “important”.
For more information on PageRank, check out http://en.wikipedia.org/wiki/PageRank
Apparently the actual update was on the 30th of December, so many people will start to see changes on the search engines over the new year and the beginning of 2009. If anyone is interested, SEO Company has a page showing updates, I dont know how accurate it is, or how up to date, but it has some interesting info anyway.
Sadly, not everyone is going to benefit from the changes, there are many sites that will drop in PageRank, but I suppose not everyone can be a winner, there has to be a loser too
The sites I noticed the biggest change on, were the ones that I have been working hard on with on-page SEO, as well as making them faster loading, valid xhtml and css, cross browser compliant.
Lets hope that 2009 is a good year for all our websites, good luck to all!