Also, again I am no pro.. But I have read that roots have a bigger bearing on yield. Something to the effect of the longer and more roots, the better for the yield.
I have also read that giving a plant "less" water will cause the roots to grow in search for water. Ive read that you want to make the roots attempt to go find the water, thus making them grow their roots...
So, if I add the both of those findings together I get the idea that less water = better in SOME aspects.. of course, you'd have to get it down to a science.. but definately something to keep in mind or think about.
Having said that, again, I am no pro so that could be idiotic. I can say I really dont let me soil get as wet as yours, and my roots were ALL OVER when I took them out of the plastic cup... I mean, they were wraping around and they were totally in the shape of the cup.. So, I think that it may work.
Im sorry, I dont have the sites to cite my sources, so take it however you'd like.