Torque is only one of the effects either cancelled or greatly reduced by the Contra. And I honestly believe torque is relatively minor in most models. Gyro precession is probably the largest one greatly reduced with the contra. P-Factor is another one practically eliminated. And then the greatly reduced spiral slipstream is the last.

The Contra won't make a poorly designed or set-up model in to the perfect plane. And it does have it's own aerodynamic needs from an airframe. But it is the closest to getting "pure" thrust as we have right now. That's an opinion based on over 1,200 flights with a Contra equipped pattern model.