You can brake-boost, which negates most of the lag in a turbo'd car. Still not as flat curve, but reduces / kills the lag.

For general "racing" you can apply a number of tricks, including "pumping" the gas during cornering, clutch in more gradually, brake boosting - all keeping the turbo spooled. But I was specifically thinking about running at a fixed speed between 1500-2000 rpm and then mash the gas because you want acceleration - think of overtaking. An EV is vastly superior in this regard because you just press the throttle and off you go.