I don't think this really justifies GP's gripes about Wikipedia or sorted data occurring a lot in the real world. To get the first-element pivot selection quick

I don't think this really justifies GP's gripes about Wikipedia or sorted data occurring a lot in the real world. To get the first-element pivot selection quicksort to regularly interact with the sorted data, we would need some standard library to actually ship a quicksort that always picks the first element as the pivot. I don't think any of these exist.