Found a key for touch prediction that when edited showed a marked improvement in keyboard responsiveness and small item manipulation ie classic desktop, file explorer, etc.
The key is: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\TouchPredict ion
Edit key for latency from 8 to 2.
Edit sample time from 8 to 2
See attached for a edited registry key to inject. Tested on two surfaces with no ill effects.
edit: to answer a few questions: this increases performance on all touch aspects of the device