The report did mention that it is rather difficult to remove the display of the Galaxy S5, as Samsung has relied on a special kind of adhesive in order to keep the display panel attached to the rest of the body as strongly as possible. It looks like heating up the Galaxy S5 a bit could help melt away the glue, making the display easier to remove.
Should you be successful in doing so, the teardown begins to gather speed from there, although it is said that the entire exercise in the hands of a skilled person should easily take more than an hour, too. The battery on this device is said to be elongated, just like what Apple uses on their latest iPhones.