Been doing this with my corona ever since I ran across that same article. It's great. To some of the previous posts, the point is to be able to crush tighter while still keeping the husks relatively intact. In essence you're grinding the starches finer (better and quicker conversion) while keeping your husks more intact (better lautering). If you condition and do nothing to your gap, then I can see why there might be a decrease in efficiency. The husk is more pliable and might not crack as easily.
I crush the night before. I put a thin layer (a little less than 1/4") in the bottom of a wide under-bed tupperware storage container. I mist it down with a spray bottle and mix up the grains by hand. Add another layer, repeat. I let sit for 10 min while staging my other brew gear for the next morning. After 10-15 min, I crush and store the grain in a Homer bucket until the next morning.
"Goin' downtown to the disco, gotta do it right away. Got a funky thing to get into, gonna blow my blues away!"