That’s an incorrect statement. A 400WHP @ 4000 RPM civic (hypothetical) vs a 400WHP @ 3500 RPM civic will both loose traction, it’s just a matter of when. Not to mention the torque curve isn’t “gradual”, it just takes longer for the same “spike” in power.
You have the statement : “Lag for traction, top end for the action” stuck in your head. If you have that much lag, you aren’t making power, and it’s not going to help you with traction when BAM at 7000RPM you hit full boost and Daaa daaa daa daaa daaaa bounce off the rev limiter because you’re making 600HP and driving on 205s.