Anyone have a link?
EDIT: Thanks to Bobthebolter below for providing the link 
Of note, the interface seems unchanged. There is an option for Premade Groups in the Dungeons & Raids tab, but none in the Player vs. Player tab.
Among the types of Premade Groups: Dungeons, Raids, Custom, the latter (Custom) has been used while forming PVP groups, though I am unable to confirm whether this is cross-realm.
I know that the Dungeons option has been cross-realm for a while, as I have used it while forming Challenge Mode groups.
