Teleports from 'Gold' achieves in Challenges

It has been recently data-mined that achieving 'gold' level in challenge modes will reward you with an ability to teleport there.

I just want to say that i love this system to bits. Now there's finally a reason to aim for Gold with these challenge modes! You end up getting a teleport to the dungeon entrance! (I assume it teleports you to near the instance entrance but outside the dungeon so you can use it to travel to other places, like engineering teleport.)

I was going to run challenges before, but had no particular reason to aim for gold. Yeah, I like transmog but there's only so much time I'm willing to spend on a piece of gear. This however!

If this makes it into live, I am SO there with the challenge modes! Awesome. My engineering mage needs this precioussss.....