Did you guys see the world first 85 and how blizzard hotfixed an speedleveling area WHILE this guy did it on stream?

I wonder if there are really good spots out there to grind really good xp, or whats the best xp farm one can do solo for much more xp than running dungeons or questing through.
Someone here of the first day 85's can tell me how to get there fast?

I'm sure there are still some that people don't know about.
Buddy of mine had one that he did in 5 hours..not the 3 hours the first guy did but still damn good