
Good points everyone! However, I still think that our heroes advanced way too fast. Take Guo Jing for example; it was said that he was slow (compared to Yang Guo and Huang Rong who were so smart). Just because snake blood and 9 Yin Manual he suddenly reached level above Qiu Chuji et al? Please also remember that Yang Guo reached his level (mentioned by kyss of the sword)
before the snake gallbladder episode. Take Zhang Wuji now, he reached his level as the formidable fighter only after 9 Yang Manual. I mean, those manuals are magical.

I don't know how to say this, but I think our heroes just too fast (to reach their levels) and too powerful; it was like they were just lucky and not because of years of hard work.