"If I was to guess, I would say you could imagine the entire continent feeling like all 5 of the Cataclysm 80-85 zones combined"
So essentially no 'huge' zones etc..
PS: Please don't get me started with the 'no flying mount till lvl90' - I know that already. I m talking about the impression that was given that each zone would be like double the size of Cata zones...