I bought the Xornet for cheap as a sidegrade from my IME 3.0 but found all of the skipping issues on my first night. Since the shape is great I bought a second hand Spawn. In the meantime my friend brought me a Handstands Supermat Grey from the states.
It seems to me that the Spawn even outperforms my Xornet on the grey mousepad. And the Xornet doesn't work much at all on my QCK. It skips at what must be 1 m/s or so on my Puretrak Talent (180 swipe).
It has been mentioned that the Xornet should have a higher top speed than the Spawn under the right circumstances. But has anyone with both mice actually found that?
Is it possible that I just got unlucky with the sensor/lens on my Xornet?
As a side note, for those who hate the standard cords, I recommend stripping away to the 4 bare USB wires. If you don't want to ruin your Spawn/Xornet cable, then do it for some old USB cord and match the pins when you plug it in to the PCB. I do this for all of my mice now and it feels amazingly better. If the cable ever breaks I have several more.