Seems unlikely. It's awfully difficult to integrate an acquisition like EtherPad so quickly. I've read that they've been working on a real-time architecture from the ground up for a while. Plus, I think the Etherpad team joined Wave, not Docs.
You will remember that the original versions of these products were independently developed and then acquired by Google.
Still haven't seen the results, but I assume they threw in a few features on the way also. Docs had seen no interesting additions in quite a while despite the very capable team. So now it is coming out of maintenance mode and will hopefully add features and stay relatively responsive.
This was one of the features of EtherPad that the EtherPad team considered "a hard problem."