Well, I'm not error free but other than a problem which we think was because of an already fixed issue that my TB didn't have, I'm pretty sure the errrors have been my own. Sometimes I thought otherwise, but then I'd deliberately type a pattern where I'd see the error and freeze on the letter that was messing up so I could then look where my finger was. Every time it turned out that my finger was hitting the wrong place.
I wish I made fewer errors myself, but I did so research about accuracy and it seems that 97% or better is considered to be "good enough" for a job. Well, I always am that fast, at least with text so maybe I'm expecting myself to be too good.
I can say that often when I start each day, I tend to make more errors, as if I've forgotten proper hand position. I probably should start slower to reestablish the feel. But I have no desire to go back to my Apple keyboard.