Sadly, that review site is wrong. Nowhere in the Fuji specs does it say that the camera is weather sealed. Oh well. It does say that it can operate in 10-80% humidity and not get any condensation, but thats hardly the same thing
I reckon the lowlight shots will just look like those from the X10. Internally (sensor, processing and functions), the cameras are very much the same. Let's hope for better weather, so I can actually go outside and photography something worthwhile. I'll definitely take the X-S1 to Singapore and Bali, where I'll do the shooting for my upcoming book about the X-Pro1.
799 seems awefully steep for a premium bridge camera. On paper it looks better in some ways than the best that Panasonic or Sony offers, but just not that much more. I think I mentioned it before, I'd be more interested in a larger sensor more conservative size zoom bridge camera with a faster lens.