Ok, you can see how crappy my handwriting is
So different nibs, different speed writing. The pen sends pressure data but the notes (scribbler) application doesn't use it or recognize it, it does not send tilt (some Wacom tablets send tilt).
There is also an issue where when you first write something the result looks different than when you re-display it. The simplest explanation is that the simple frame buffer driver in the Illiad isn't tuned for an E-Ink display, during writing there seems to be a very simple "turn what every pixels are under the pointer during 'contact' on" with a simple "and those pixels in a 0, 1, 2, or 3 pixel radius" kind of enhancement for width. But when it re-renders it parses the data file and trys to draw what you wrote and doesn't do as good a job. So either its not capturing everything the pen has sent, or its just doing a bad job of interpolating between samples. Personally I think its the latter.
--Chuck