I read your comment soon after you posted it and sort of nodded internally, but over the last two days I've been actively noting how often I'm making a slip (i.e. through accidental 3D touch, or accidental swipe or whatever).

I think the 20% is actually pretty damn close to what my real error rate is, which astounded me. Even just stuff like initiating a scroll, I'm finding that I've started subconsciously ignoring the accidental 3D touch activations. I thought it would have been maybe 5%.