What is the "speed" of the electronic shutter's shutter in several cameras without a mirror?

The shutter speed (term coined by dpreview afaik editors) is the time it takes the camera to display and read the entire sensor in electronic shutter mode, it is different from the "shutter speed" that indicates the duration of the exposure of each photosite and can be considered as the "synchronization speed" of an electronic shutter, as well as the faster shutter speed at which "rolling shutter" artifacts can not be expected (although it does not guarantee the freezing of movement).

Of special interest are the Fujifilm X-T2, X-T20, X-T3, X-E3, X-H1 and X-100F, as well as the newly-introduced full-frame mirrorless cameras from Nikon Canon and Sony.