You are right, I did miscalculate my power costs.
Those Antminers are still running, and will be profitable until roughly October/2014.
Thank you for pointing that out.
For those of us who have been mining during your same time frame, as close as we have been able to get to making ROI, we recognize that doing so has been very much dependent upon starting mining at that particular time (ie. in late 2013). An opportunity that is vanishingly small, considering the considerable cost of home mining equipment. Timing was everything. The window for that opportunity has been rapidly closing over the past few months as the difficulty level has increased. It is not worth bragging about getting ROI because it can encourage new miners to believe that can do the same.