The original FujiRumors article references two trusted sources, a sign that, in abject defiance of Betteridge's Law, X-T1b may be real. A smart, customer-oriented, brand-conscious company would establish hard release schedules, keep to them, and defy rumours. It would look to the future and build perfection. It wouldn't rely on prototypical designs that mould paying customers into beta testers.
But let's face it, Fujifilm is a Japanese camera manufacturer in a rudderless Japanese camera market. If true, this could be the first concrete example of Fujifilm pulling an Astell & Kern-esque market ejaculation.