I'm a human, have the guild bonus and used the extra buff from the darkmoon faire every day it was available, I bought the grand commendation for even more rep when I reached revered and I have not missed a single set of dailies and I am currently about half way into Revered. There is no possible way that I know of that anyone could be much further ahead than me...
But I have seen plenty of people on my server riding the exalted mount and I have seen people talking about the end of the questline on forums etc. My question is HOW?
It shouldn't be possible. I have used every single rep bonus there is and there is no way people could possibly be more than 10k rep ahead. What cheats are they using to get rep so quickly?
With the facts you have given you must be lying. I got exalted on the 12th and I missed 4 days or so of questing.