Because this thread is "supposed" to be about badges and rep, I have noticed that people with the MVP badge are instantly shown as Guru's no matter how many green dots appear. This one only had 2 green dots with a Guru badge. I'am guessing that is the faster way to achieve Guru status.
I'am certain that the MVP's did some work to achieve this but I'am not sure of the criteria required for the MVP badges.
I had to fix about 500 problems to get this.