Allpar has amended that statement, you might see it in 2014, and GM may use it also.
The high cost of diesel makes the truck more attractive, unless it reaches the disparity it did in 2008, negating the advantage of its use variance.
IMO, we're going to be driving the Mahindra, despite their issues with GV, long before we see a diesel half-ton from the Big Three. It does actually exist and already has the blessing of the Punishment Agency.