The 1.9.1 touch-disable tool does not appear to actually turn off the capacitive layer; it just prevents it from communicating with the underlying app. You can see this if you enable "Show touches" in the developer options. It's still picking up your touch, it's just not doing anything with it.
However, with root access, you can more effectively disable the capacitive layer by entering
Code:
echo 1 > /sys/onyx_misc/captp_disable
. However however, that doesn't seem to reduce lag either.