The current default delay and behaviour of 'disable touchpad while typing' is as follows: syndaemon -i 2.0 -K -R This is not ideal, because the delay of two seconds is too long and interferes with productivity. Furthermore, only tapping and scrolling need to be disabled; mouse pointer movements need not be disabled, as they can do no harm. So in my opinion a better default setting would be: syndaemon -i 0.5 -K -R -t
I agree that a shorter time would be better - the current setting is annoying enough to be unusable for me. But it would probably be best to have it configurable. Disabling mouse pointer movements would be important if you had a "focus follows mouse" setting in your window manager, so perhaps making that configurable too is the way to go.
*** This bug has been marked as a duplicate of bug 8948 ***