I'm skeptical of claims without any research to back it up. But some thoughts (DISCLAIMER this is BS) An effect of having triangular keys instead of square key

I'm skeptical of claims without any research to back it up. But some thoughts (DISCLAIMER this is BS) An effect of having triangular keys instead of square keys on a soft keyboard is that each key has a clearly delineated boundary rather than sharing boundaries. I wonder if that can have an effect on how well people can associate a given shape with a letter when looking at it. I also might guess with the extra space it takes longer to visually scan across the keyboard if you are looking for a key. So if there was a benefit to accuracy maybe it would be from slowing down the user enough for them to really process what they are looking at.