The one you linked is just as much speculation as 3DCenters.Many mistakes.
GP100 has already been announced yet article shows Q4-2016.
Volta is 2017 not 2018/2019.
http://techfrag.com/2016/01/25/nvid...t-in-april-gtx-1080-in-june-and-volta-in-2017
GP106 is July 2016 not Sept 2016.
GP100 might refer to actual production for anything but the DXG-1-machines, in PCIe form.
GP106 has been said to be july, august and september by different sources, any of them is just as likely as the next.
Volta is around late 2017 / early 2018 according to NVIDIAs latest roadmaps. Based on their past schedules, 2018 is more likely, and probably not even too early in the year (I'd put my money on march/april and GTC 2018)