Joomla / Drupal / Wordpress and SEO

Hi All

A few months back I posted about a test we were running to try and compare the SEO of Drupal, Joomla and Wordpress.

We've three months of results so far and the results are up:

http://www.alledia.com/blog/seo-competition/march-update-to-search-engin...

Basically we found that the Wordpress site started off miles ahead of Drupal and Joomla, but that overtime Drupal and Joomla have started to win out.

We also tried to come to some conclusions about what the results might mean, and those are summarised in the second section of the report.

All feedback welcome, particularly as we realise the current test has flaws and we'd like to run an improved follow-up.