From my experiences, no. Usually these ADHD ideas don't actually come through as words so dictating requires a layer of translation from idea to words. This is also the struggle with handwriting or typing. The idea is happening and leaving at the same rate, so you can't slow down to translate. It needs to be an instant mind-to-text transfer like the other person mentioned

Edit to add: To me, these ADHD thoughts feels like a classroom having a debate at 2x speed. I'm coming up with arguments, counterpoints, counterarguments, etc. so quickly that my conscious mind cannot keep up with the conversation. If I'm lucky, I get to have an understanding of the finished product. This is what drives the "well..." trailing off when I'm trying to explain these thoughts to neurotypicals. The conversation is still ongoing, and a counterpoint was brought up after translation which disrupted the entire thought process

I think faster than I can talk a lot of times. That's why I'm always tripping over my own sentences and words.