There is a crop factor error in the specs quote on the X10. If the sensor is 2/3" it must have a crop factor of 3.94 not 5.50. We know this because the X10 lens is 7.1mm - 28.4mm which converts to 28mm - 112mm.
If it was 5.50 you end up with 40mm. :)
Also the crop factor and sensor size are missing from the preview of the X-S1 listing as well. But we know these because it is the same sensor. Therefore 6.6mm x 8.8mm crop factor of 3.94x.
The sensor does not have stabilization but lens does so the specs of the X10 is yes to that question not no.
Finally the shutter speeds are know 30 - 1/4000.