Not sure if this is accurate or not, feel free to chime in if you are or know someone who is eligible prior, but I've heard there were Oct 2016 upgrades that were some of the first to qualify under DGI. If that is accurate, then we are about 9 months away, minus the E2D few.
That being said, it is my opinion that if any E2D guys don't upgrade, they should simply be bypassed. Seems unfair to hold up those who are trying their best to succeed in going to DL and meet the requirements.