Bluetooth? The pen only uses the radio for screen clipping and launching OneNote.....the Digitizer uses an electrical,current from the pen that the sensor on the screen detects to close the Circuit for the X-Y Axis.
Right. I'm talking about polling.
I'm convinced that under Windows 8.1, collateral Bluetooth activity was interrupting the inking, causing stuttering or chatter. When I turned my Bluetooth mouse off, or disconnected my phone from its Bluetooth connection, the inking was okay.
This issue was the worst when I was in the office amidst an office pool full of Bluetooth activity (mouse, keyboard, smartphones, and music streaming). Under the last two Windows 10 builds, no such problem.