Could well be.
They'll haul a couple of hundred ton load and more up a pretty steep slope, so should be worth a few camels.
We were mainly driving on sand on the airport, as they'd covered the whole man-made island with a few feet of it.
Deep dry sand really does drag and slow you down though.
The big trucks were used to carry huge chunks of granite (delivered by sea) across to the rock-crushing plant. They ran on their own exclusive roads so as to avoid squashing any of the piddling little 4x4 Nissan Patrols etc.
Obviously this vid is a set-up, but the vehicles are real:
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