I too think knowledge acquisition is faster -
much faster - but that's only when
I can actually get myself to sit down and focus. Depending on some magic combination of my mood, feeling of purpose, and phases of the moon, I can blow through a thick spec book in one long session and remember both tons of little trivia
and grok the principles behind the design, all in one pass - or, I'll get sleepy after the third sentence, take an involuntary nap halfway through the first page, and overall maybe read a dozen pages before giving up, and not remembering much of if later.
I had this experience several times at work - I had to deal with some obscure legacy tech (think industrial protocols from the 90s), I enthusiastically figured I can learn this quickly, sat down to reference material, and... my eyes stopped being able to process text. And yet, over the following weeks or months, I'd have moments trying to work with that old thing, where I'd suddenly find a rabbit hole I had to chase, and through that chase I'd get rapidly up to speed with the spec that was impossible to even look at earlier.
Long term, this added to a much deeper understanding than people around me had, for fraction of the effort - so this was a win. Unfortunately, this also isn't compatible with how everyone works, as I can't plan or give other people promises or estimates around this. "I'll get there when I get there" doesn't fly in the modern workplace.
Like a few other related aspects of ADHD, it really is a superpower - just very hard to activate, and trying to activate it on demand actually makes it impossible.