My minimal experience in the X-59 (ABC) lends me to believe that both arguments may be correct. At lift off to a hover the X-2 is a pure coaxial rotor helicopter just like the X-59. Once the X-59 accelerated to more than 200 KIAS under power from the J-60s, the engine torque from the 2 PT6 rotor drive motors dropped to 0%. At that point the helicopter was an auto-gyro. The question is, at 235 KIAS is any of the S-2's engine torque going to the main rotor system.