I have updated to 8120 and my accuracy and speed is unchanged. I type about 60 wpm on the TB and 55 wpm on my MacBook Pro. My error rate is much higher on the Mac, since I primarily type on the TB and switching back and forth has some penalty, but accuracy will never be as high as the TB because having to stretch to reach some keys. Being pulled off of the home keys, costs time and accuracy to resettle back on them correctly. In my typing tests, I was able to touch type numbers and symbols on the TB, while on the MBP, I tend to look because I am not good at these stretches.