Personally, I think it's the screen.
I bought a $10 stylus, and it sucked on it.
Then I helped fund the "Cosmonaut" stylus on Kickstarted, so I got one of those for free, and it is absolutely incredible, but it doesn't work on the A100. It is choppy when I draw, like it isn't always conducting.
But when I use it on my phone, or on my sister's iPad, it works flawlessly.
That's why I think it is the screen.
Why the hell was my signature a line from Genesis in the bible?
Let me fix that:
In the begining, Man created god.