The GTI code will be updated with a few changes from over the years. Old 2010 code will be updated over time as well. I did not realize I called it 'beta' and that was what you were referring to.
the post you are referencing from arin was posted in feb 2010, not feb 2011 - it's basically a year old. i would suspect that the beta he's talking about was released as part of the 2010 tune.