Ah yes, I can't recall if all the pax have to get off on that transit and then reboard or whether those "going through" can stay onboard - they used to be able to and that speeds the tech stop up. I've also seen on occasions 1 hour transits done in SIN on the LHR/Oz routes, and that is somewhere where everybody has to get off, but the key to that one working so quickly is having efficient ground staff and an efficient terminal/gate layout.