Some of you dudes are pulling the old double standard routine. It goes like this: A judo black belt is sand bagging if he competes white / blue belt in a bjj tournament. However, according to some of you guys, a bjj blue belt is the equivalent of a judo black belt. You're spouting shit.
Also, what's this crap of getting a judo belt promotion every 2 months? I've been doing Judo for 5 years and I'm a green belt. The belts in Judo go: white, yellow, orange, green, then 3 levels of brown, black. So it's taken me, and most of my buddies, about a year or so per belt promotion.