The only Ferocious Guroks I found, where the quest pointed me to, were 16-19, with the sows being 14-15 (But they pull Grulets, meaning they are often harder then the Gurok males), and the Grulets (Which don't count, and pull with each other) at level 11-13. Quest specifically states that the Grulets don't count.
The only boss in particular I have an issue with is the lvl 15 skeleton (Who is alone) near the quarry to the west of Kion. The others I have found placed rather reasonably, and often with other mobs of its type. (So you can expect them at least) Even the lvl 11 sand beetle boss inside Kion I think is well placed. Same with Tsunami in the crystal lakes, and Ingot with the bronze golems.
@walkerglassmire
About the parrot quest, the bottom line is, I want a quest that a person of X level can get, to be reasonably possible to complete at said level. This is my honest opinion as a new player.