BigRedKitty posted a perfect example of what I was talking about in the last two posts.
A hunter named Jeor has been trying to improve his DPS. His complaint:
So again I have to ask, what am I doing wrong? what is the secret that no one is telling me? is it my shot rotation? something about my build or gear? is there a special macro that no one is telling me about?
The key element here is that Jeor doesn't know what he's doing wrong. He's not stupid or unwilling to improve. However, the game has not provided him with any of the feedback he needs in order to improve.
BRK talks to him, tightens up his spec (Beastmaster), changes his shot rotation, and does a little re-gemming, and the results are staggering. Jeor provided WWS parses for Gruul attempts for the week before his tweaking and the week after. He jumps from 451 DPS to 964 DPS, a gain of over 500 DPS!
Look at Jeor's first week shot mix. Not using Steady Shot enough? Check. Missing shots? Check. Not using Kill Command? Check. The same hunter mistakes, again and again.
Compare to his shot mix the next week. Now that's acceptable DPS.
BRK's post was very useful precisely because of the WWS parses, only 1 week apart. Feedback improves your play, and DPS players don't get feedback from the game, so they have to go outside it (to BRK in this case) in order to get the feedback they need to improve.