Yes, things got pretty heated over at getDPI. From what I've gathered ...
several sources/photographers are reporting GFX support by C1. However, from I can tell, all
of them are based on this video
, the applicable part occurs approximately 47 minutes in, where "someone" supposedly from Fuji stated it would. The main presenter of the video states he is sure it will support it because it supports his other Fuji files, but I'm guessing he is unaware of Phase One's policy to not support other medium format cameras with C1.
As to the person who claims it will support it, I don't think anyone knows who he is, it is assumed he is from Fuji because the presenter poses the question to him. But he could also be "uninformed", assuming C1 will support it because it's a Fuji camera and it supports all of the other Fuji cameras but he may very well also not be aware of Phase's policy to not support other MF systems.
So after reading all of this, watching the video, etc. personally I'm pretty skeptical at this point.