I hope this is an indication they're considering a switch to Git for the future. It makes a lot of sense to me consider the distributed nature of Automattic's workforce and the large number of contributors to the codebase.
http://markjaquith.wordpress.com/2011/05/26/developing-on-wo...
Jesus. I thought SVN had beaten CVS years ago...
Believe it or not, just because there is a notice that a new version of free software is out, doesn't mean any non-technical person will follow through with the notice.
Kudos on this.
And, most disturbingly, there is also https://github.com/wordpress/wordpress, which looks more "official" but wasn't updated since about 1 year.
It would be awesome if WordPress would publish the official stuff under the wordpress github account - there would be less confusion, IMHO.
But to your point, indeed. The open-source community does pay attention to what's on Github. I'd love to see Wordpress move over to github - It would certainly make me follow the development closely and probably fix outstanding issues. Git (and pull requests on Github) make contributing so easy, it just makes sense.