Google Searching for Codeigniter User Guide

I dont see how Google webmaster would be of any help here? For any search term related to CodeIgniter, ellislab.com has build up quite a reputation for it. Considering the facts that:
1. The current documentation (probably) consists of a lot of duplicated content from the original (at ellislab.com)
2. Ellislab.com has more incomming links from across the web regarding CodeIgniter terms and is an older (active) domain
3. CodeIgniter.com has a thank you link in the footer (on every page) to ellislab.com, the other way round is only a link on a view pages.

The only way I see that codeigniter.com would outgrow the relevance of ellislab.com is to either have https://ellislab.com/codeigniter/user-guide 301 redirect to http://www.codeigniter.com/user_guide/, or wait a couple of years.

Frankly I dont understand what motivates Ellislab to have an old codumentation on their domain. Anyone knows if ExpressEngine still runs CI 2.2.0 or has it migrated to CI3 (or adopted the 2.2.6 version)?

Whenever I need to view some documentation I have adopted a habit of adding a "3" in my search query, just to get the codeigniter.com results on top of the page. So I would search for "codeigniter 3 form validation" for example instead of "codegniter form validation". Shamefully it does the trick...