It's pretty validating to hear this. My partner, I love him to death, but oh my God when he tries to predict what I'm going to say and cuts me off to do so, it feels so rude. It's like why should I bother speaking if you already have decided what I'm going to say? And it's so often inaccurate.
I know it's part of the ADHD processing so I try to dismiss it, I know he doesn't mean to cut me off, but WOW is it trying.
My partner tells me something similar. That I make long pauses when I speak, that he's usually right in his guessing and that not doing it is insanely stressful. It sounds incredibly frustrating, to be fair, so I'm trying hard to not be annoyed at what I, as a gut reaction, perceive is rudeness.
The thing is, that doesn't really line up with how I experience it. I feel I get interrupted between words and it seems like I have to then pause and correct him more often than say "That's right!" (Something I'm trying to do when he does guess correctly instead of getting annoyed at being interrupted).
So I wonder if there's a common element in ADHD people thinking neurotypical people are talking much slower than the neurotypical perceive they are and if the instances of being incorrect feel more inconsequential or perhaps the instances of being correct in guessing are very validating in some way.