Well...Voice control can be little tweaked by adjusting Microsoft Voice Recognition Engine and your mic&sound recording settings in mixer(or whatever your card have)...There is slider where u can choose between accuracy and lattency(if my memory is right) so u can choose to have little delay but correct command..
However it can still be very funny when u start to shoot commands in hot situation and your voice recognition goes crazy..
In that situation it become next to usles..