Considering that Uber is going open beta on the 15th per their blog announcement (11 days away), I would imagine that there is more there than just a blog post.
I'm sure both Uber and Lyft were aware of this feature being designed by their each and are trying to get their respective features out the door.
Ever notice how AWS and Google release price decreases within the same days? Same thing. They have been told it is upcoming and are doing the same thing. I've seen it personally.