This assumption is not supported by the facts we have seen on the LR. The website states that the car comes with Insane acceleration and the test mules had Insane listed as an option in addition to the Chill, Sport, and Drag Strip modes.
The LR and Plaid can both be driven in the most aggressive driving mode at all times which is Insane and Plaid respectively. You just wouldn't activate drag strip mode because that is the Max Battery Power option that takes time to warmup. Also, anyone that has a performance model with Ludicrous will know that the max battery power mode can not be used at all times because it makes the car sound like a helicopter with fans spinning so loudly that people ask you what is wrong with your car.
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