From the leaked release note:
Motor control enhancements initially developed for dual-motor Model S have now been incorporated into real-wheel-drive Model S, enabling higher acceleration at all speeds, especially near top speed.
Tesla releases second version of its beta v7.0 software update with Autopilot [Updated] | Electrek
Motor control enhancements initially developed for dual-motor Model S have now been incorporated into real-wheel-drive Model S, enabling higher acceleration at all speeds, especially near top speed.
Tesla releases second version of its beta v7.0 software update with Autopilot [Updated] | Electrek