Not being a fixie rider, I wouldn't know. But say I'm doing about 25 mph and all of a sudden I notice the car in front of me jams on its brakes and I brake hard as I swerve and notice that there's a line of pedestrians at the crosswalk and I'm in that gap with cars to the left and right of me. If I grab my front and rear brake hard and slide my ass back, would I stop faster if I have brakes or no brakes?