Wouldn't of thought it'd taken a hour to shift that. A set of decent quality go jacks and you can move any car quickly enough. I have a set for moving 4wd stuff round workshops as they're a pig to push. It was obviously done by someone that knew what they were doing. Such a shame and I'm sure your friend is well cross about it!
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I doubt they had the best of gear, also all 4 wheels locked, get up a 4" kerb. Pivoted round and dragged about then down another 4" kerb etc. Maybe not a hour but not a handy task anyway, in dark, while trying to be half quiet. At a guess the car alarm never went off either, mustn't have the hottest of sensors.
But still completely baffled why they done the above when it could have been dragged out into the road just as if being driven away.