I've tried most high-end android phones and find they all share the same touch lag issue. When I slide my finger on the screen, the screen doesn't react until my finger has moved a few millimeters or so(which is easily noticeable). This problem does not exist on iOS or WP7 or even Windows Mobile 6.
Is the touch lag related to the android kernal or the visual machine? Is it fixed on the Galaxy Nexus? If not, is it possible that the lag will be fixed in the future. I surely hope the problem be fixed way before the day when android fades away.