I experienced just under 2 weeks on a repair. That was in 2014.
Communication was good. It really seemed like Fuji had their **** together.
The grip on the Xt1 getting loose is a pretty well known issue.
Fuji has done a ton of them (replacememnts) so,.. it should be quick.
I had a 3rd party handgrip on my TX1 which seems to have saved the rubber.
More importantly though is it's a better fit for bigger hands.