i suppose that depends on why your useing brake stearing.
if its to pivot on a tire for an extra sharp turn 4x4 or not, it wont matter.
but if your front ribbed (or nearly bald front 4x2 tires) are not gripping and you NEED to make a turn, your best bet is to stomp a rear break to inniate the turn.
often times 4x4 (if ingaged) will pull the front end in the direction you are turning thus not needing extra rear brakeing help.
Only times ive used it is ive got the fronts off the ground and want to make a slight course correction, but with a hydro its a bit more difficult (at least going left)
(i still mean to move the cruse control disable to the clutch peddle were it belongs)