Think what you want. Powerleveling in any RPG, MMO or otherwise, is mindboggling to me, because you skip so much content.
For your information, because it is clearly your business, my characters are levels 21 and 17. My snails pace through this game (8 hours or so every weekend) ensures me a greater chance of less bugs and more content at the later levels.
And I will never PVP in this game. Ever. Not my cup of soup.