As of now, a couple of people have said that May 14, 2013 is the day the lens will be officially announced with availability coming in September/October 2013.
Is it possible that someone misread the date as May-14 (and hence jumping to mid 2014), instead of May 14, 2013?
1DX, 5D3, 600D, RX100
16-35L, 24-70L II, 70-200L II, 100-400L, 50L, 85L II, 135L, 24TSE, 40, 100 macro, 18-55 II, 55-250 II, 1.4x III, 2x III, 600RT x 4
The grass is always greener when you crank up the saturation in photoshop