
That's when the deployment will commence, though as usual it will take a few weeks for all regional versions of the S5 to get the new bits. Still, given that Google has yet to release a final variant of Lollipop, this would be a very fast update timeline for both the G3 and the S5, and the new software would come much sooner than for past flagships getting Android version bumps.
A test build of Lollipop for the Galaxy S5 got previewed a few weeks back, and since Samsung was clearly already working on the update at that time, the rumored release time frame may just pan out. We'll have to wait and see.