> OP's self-reported ability to expend extreme effort to accomplish his work
This is not the same thing OP reports. OP reports having the ability to laser-focus, and page 9 talks about an impairment on this level.
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FTA (page 9):
> a university student with ADHD might need to work twice as hard as peers with the same aptitude to focus attention or to organize school work
This means that the ability to focus is impaired, because achieving the same result requires more effort.
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From OP:
> I’ve always thought of my ADHD as a superpower, as I have the ability to intensely hyperfocus and get incredible amounts of work done
Unless OP meant something different than what they literally wrote, this is the opposite. This means OP believes their ADHD helps them focus intensely somehow. In reality ADHD would have the complete opposite effect.