Cannot speak for higher mode, but the unlike EN I saw a ramp up while pugging normal NH this morning. The first 3 bosses were cake (pun intended), while Spellblade already required a bit more from your DPS. Krosus is easy, but Tichondrius is a veritable brick wall for pugs. He feels more like a Heroic boss. I ran out of time so didn't kill him before I had to log.
EN was weird in that Nythendra was already pretty much as hard as anything in Normal save Eye and Cenarius. I suspect Tichondrius will be the new Cenarius, and the hardest pre-Elisande and Gul'dan boss.