When I started go hydro I chose Ebb and flow,because it was easy and had good results.Now after awhile,its obvious that DWC is yielding more,but I have gotten fond of my set up,so I stay with it,but in my mind there are no doubt that DWC yields more than almost everything else.
Have you run DWC?
If not, then it probably isnt fair to say it yields more. I am sure you are saying that compared to other grows you see but so many factors come into play besides the system