Which seems to be in direct contradiction with this post.
As of right now the top 20 witnesses are all running 0.19 but the changes described below will not go into effect until tomorrow morning (Tuesday, June 20th, 2017 at 15:00:00 UTC). Once those changes in logic take effect, the voting power of the users of any Steem-based application will be directly proportional to the amount of Steem Power they possess.
Need a clarification from the developers.