- iPhone: Precise lines indicate accurate representation of finger path. Noticeable loss of sensitivity at edges.
- HTC Droid Eris: Fairly linear track, with some waviness.
- Motorola Droid: Stair-stepping and waviness indicate inaccuracies in tracking travel of finger.
- Google Nexus One: Fairly linear track, with some waviness.
My conclusion: Not one of the four smartphone’s capacitive touch sensing systems are perfect but it seems the iPhone is the closest to being perfect. Make sure to visit MOTO to see the pictures of all four phones with the test pattern. MOTO via Daring Fireball