I've been doing a Relative Intensity Study since the 8th of June with a small group of folks out of TCFA. It's been an interesting experience so far, and I have to say that it IS working!
Within a month, so far, here are some of the benefits:
My Fran time dropped by about 3 minutes
My shoulder press went from 70 to 75 lbs
My bench press went from 65 to 80 lbs
My Clean & Jerk went from 95 to 100
My Snatch went from 55 to 65 lbs
Basically we do the main site WODS in order from January, and we scale them accordingly based on formulas derived by Pierre Auge of CrossFit Ottawa.
Although I miss running something fierce, I have to admit I am getting pretty good results so far.